The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009

Weekly Space Hangout - May 10, 2013

Fri, 24 May 2013 11:00:00 +0000

Join our crew of space journalists and aficionados as we round up this week's space news. We'll have rocket launches, images of a solar eclipse, weird astrophysics and more! Hosted by Fraser Cain, produced by Nicole Gugliucci, and joined this week by David Dickinson, Nancy Atkinson, and Pamela Gay

Planetary Society - Emily Dean on a Sol in the Life of Opportunity

Thu, 23 May 2013 11:00:00 +0000

Casey Dreier talks to Matt Kaplan and then with Emily Dean, who has been involved with the Mars Exploration Rovers since she was in high school. While earning a degree in Art and Architectural History at Ithaca College, she continued to support the MER mission until she had the opportunity to take a full time operations position at Cornell.

Learning Space - episode 17

Wed, 22 May 2013 11:00:00 +0000

Learning Space - Family Science - Nicole Gugliucci with Jake Noel-Storr, RIT Insight Lab.

UNAWE Space Scoop - Orion and the Cool Universe

Tue, 21 May 2013 11:00:00 +0000

Here you can enjoy the latest Space Scoop, unawe.org's astronomy news service for children aged 8 and above. The idea behind Space Scoop is to change the way science is often perceived by young children as an outdated and dull subject. By sharing exciting new astronomical discoveries with them, we can inspire children to develop an interest in science and technology. Space Scoop makes a wonderful tool that can be used in the classroom to teach and discuss the latest astronomy news.

Astronomy Cast - Space Station part 3: ISS

Mon, 20 May 2013 11:00:00 +0000

Join Fraser Cain and Pamela Gay for your weekly facts-based journey through the cosmos. This week is the third installment of the "space station" series and is all about the International Space Station.

Space Stories: They're Made Out of Meat

Sun, 19 May 2013 11:20:18 +0000

Terry Bisson's "They're Made Out of Meat" originally published in Omni Magazine. Instead of us imagining aliens, imagine how aliens might see us.

Cheap Astronomy #166: Mission to Mars

Sat, 18 May 2013 11:00:00 +0000

Steve Nerlich thinks about some of the issues involved with mounting a manned mission to Mars. Not least of which is the very real danger–radiation and human error to name but two. And there's the not inconsiderable pricetag. Steve takes a practically-minded look at the problems involved.

Weekly Space Hangout - 2013-05-10

Fri, 17 May 2013 11:00:00 +0000

Broadcast on May 10, 2013

Planetary Society Weekly Hangout, May 1

Thu, 16 May 2013 11:00:00 +0000

Planetary Society Weekly Hangout, May 1: MESSENGER's mission to Mercury with Larry Nittler of the APL - Broadcast on May 3, 2013

Learning Space Ep. 16: Dawn Mission to Vesta

Wed, 15 May 2013 11:00:00 +0000

This week, we're talking to the Dawn team about their mission to the asteroid Vesta.

Dawn's year-long orbit of Vesta, its first destination in the main asteroid belt, revealed a mysterious world unique in the solar system. Roughly the diameter of the state of Arizona, Vesta is at once huge by asteroid standards (indeed, planetary scientists consider it a mini-planet), and yet small enough in radius that impacts make a whopping impression.

Unlocking Vesta's mysteries are two of Dawn mission's participating scientists:

Brett Denevi studies Vesta's regolith, the relatively fluffy surface layer, made of dust and rocky debris leftover by impacts.

Paul Schenk explores Vesta's craters, especially their weird shapes—often caused by that shifting regolith—and the tales they tell of Vesta's history!

Brett and Paul will show how their investigations of Vesta's weird and wonderful craters and pits tell the tale of the giant asteroid's history, as well as share the special role participating scientists have on NASA missions.

Links:
Educational Materials from Dawn http://dawn.jpl.nasa.gov/DawnClassroo...
Potato Light Curves! - http://dawn.jpl.nasa.gov/DawnClassroo...
SAFELY playing with dry ice to make comets - http://www.astro.virginia.edu/dsbk/fi...
Vesta with a 3D printer - http://www.flickr.com/photos/noisyast...
Dawn mission - http://dawn.jpl.nasa.gov/
Vesta citizen science - http://cosmoquest.org/mappers/vesta/

May 14th: MyMoon / CosmoQuest Hangout with Matt Sheehy of Lost Lander

Tue, 14 May 2013 11:00:00 +0000

May 13th: Astronomy Cast Talks Space Station: The International Space Station

Mon, 13 May 2013 11:00:00 +0000

Episode for May 12th: 25 years after SN1987a

Sun, 12 May 2013 11:00:00 +0000

Episode for May 11th: Dark Skies & Energy Education

Sun, 12 May 2013 02:34:30 +0000

Episode for May 10th: The Weekly Space Hangout

Fri, 10 May 2013 06:03:07 +0000

Episode for May 9th: The Planetary Society Hangout - Naming Bennu with Mike & Lary & Dante

Thu, 09 May 2013 04:58:31 +0000

May 8th: Learning Space talk about Space Apps

Wed, 08 May 2013 08:17:50 +0000

Observing with Webb in May

Tue, 07 May 2013 04:34:20 +0000

Learn what's new in the sky from Rob Webb. While May may not be the most exciting month, it still has a lot to offer!

Episode for 6 May, 2013 - AstronomyCast "Space Stations Part I"

Mon, 06 May 2013 11:00:00 +0000

Episode for 5 May, 2013 - "Astrophotography at Kitt Peak"

Sun, 05 May 2013 11:00:00 +0000

[KK: Dr. Kyle Kneisl, interviewer]

[JB: Dr. Joseph Bohanon, amateur astronomer and astrophotographer]

[Interview conducted remotely using free and open source Mumble VoIP software and the OPUS Codec on equipment operated by Dr. Kneisl]

KK: So, as mentioned in the introduction, we are talking to Dr. Joseph Bohanon who is not only a mathematician by day, but with his spare time, he is also an avid amateur astronomer, and he is also very interested in astrophotography, or, the photography of astronomical objects. He has recently returned from a week-long trip to Arizona where he went to Kitt Peak and took a number of marvelous photos which we are going to tell you about. Joe, when did you start getting interested in astronomy? I assume like most people like you and me who grow into adults that are very interested in astronomy that it was from an early time?

JB: Yeah, I think I was probably interested in astronomy about as long as I can remember...being a kid, and I grew up in kind of a sciency household...I had an interest in astronomy growing up but it wasn’t until about college years that I got more interested. So, there was another guy in my dorm that had one of these real cheap refractors that you can buy in like a science store, and so he would show me the Moon and Jupiter and Saturn and things. It wasn’t a particularly good telescope, but it got me interested enough that I really wanted to save up to buy a decent telescope, so...

KK: This day and age, when everybody has some kind of digital camera: what happens if you take the family’s digital camera that cost maybe $100 or $200, and you take it out in the yard, and you just, with that camera in your hands, attempt to take pictures of the Moon, or, even, brighter stars? Is there anything that can be done with that or is that doomed to failure?

JB: There are some things that can be done with that. You have to first consider these point and shoot cameras are designed for taking fairly wide-angle shots during the daytime, and even at nighttime, you know it tries to use the flash to illuminate things. So, when it’s night and you’re trying to take a picture of say the Moon; the Moon is bright enough that it might be able to--the auto features inside the camera might be to sort of figure out the exposure, but, you might be able to get some pictures of stars with this, so what you probably want to do is put it on a tripod because you’re going to have to take a longer exposure. So, within thirty seconds to one minute, you can actually see the stars moving just a little bit. So, if you don’t want any movement, you want to limit to maybe fifteen second shots or a little bit less. You can take pictures of constellations and things like that. You’re not going to get really good photos of, say, Jupiter just because Jupiter is very small so you need a decent amount of magnification to do it.

KK: OK, so, let’s say that someone wanted to do something very minimal. They were willing to buy a tripod, and they already had for some other reason they already had a very good SLR camera that somebody else in the house paid five or six or seven hundred dollars for. Now, even though there’s no telescope involved yet, is a setup like that going to be able to, you know, are there pictures you can take in the sky that will be impressive to the first-time astrophotographer? And what resources would somebody interested in doing that want to consult?

JB: Yeah there certainly are some you can take just with the camera not involving a telescope at all. So, for instance, if you just get a tripod and point it at the North Star and just let it expose for like fifteen minutes, the picture that you see, you will see the star trails moving around the poles. You get these nice concentric, you know, roughly circles. So, you’re going to see just a couple of degrees of movement in fifteen minutes. There have been some fantastic photos that people have taken where they do that for you know, three or four hours. Those are the types of photos that, assuming you get a really good shot, you can go somewhere scenic and try to get a tree in the background...or if you live near Washington DC you can get the Washington Monument in the foreground of your shot. There’s a decent amount of stuff that you can do just using the camera. On top of that, you sort of have to consider the fact the camera that you have, when you attach a lens, you’re essentially turning it into a type of telescope. So, it’s kind of like a refractor when you’re doing that. You know you can treat your camera like a telescope, and if you put it on a mount, so there’s something which I think we can provide a link to in the show notes, it’s called an AstroTrac, and basically it’s just a very light weight mount tha tyou can set up anywhere; you just have to polar align it and then get going, you just stick your camera right on top of that and you can actually take tracked photos anywhere in the sky.

KK: Let’s move on to the kinds of real astrophotography that people can start to do with not that much money that does involve a telescope, and does give you the kinds of shots that you are used to seeing in picturesque astronomy books. Is it the case that the type of starting telescopes---you know, three, four, five inch reflectors that people buy for $200 or less often times for their first scope, or a Dobsonian or something like that---in general, will all of these telescopes be the kinds of things that, without too much trouble, you can hook up to a camera? Now, before you answer that, I assume you have to have the kind of camera where the lenses are removable so that you can connect it to the telescope? I mean, a simple point and shoot with a fixed lens is not going to cut it, is that right?

JB: For the most part, at least for the better shots that you’re going to get. So, if you ever go to, like, a “star party” that a local astronomy club is hosting, people will come up all the time and they’ll look at the moon through your telescope and they’ll say “hey can I take a picture of this”, and they can sometimes get a pretty decent shot just putting their cell phone camera up to the eyepiece. But, the absolute best way is to be able to remove the lens, so if you have Canon or Nikon they make these things called T-ring adapters and you basically put that in where a lens would go and then on the other end you have a barrel that’s like an eyepiece that you just stick straight into the telescope and so that way you don’t have to worry about getting the edges of the eyepiece in your image so you can illuminate as much of the chip as possible and have the best chance of getting a decent image. So, I guess I’d mention, you know, the cheaper telescopes that you’re going to get, so, Dobsonians don’t come with any kind of mount that will track as you’re trying to take the picture, and that’s very important because the sky moves on the order of, you know, a star can move from one end to the other of a decent-sized eyepiece in maybe a minute. We’re talking exposures of lengths five minutes, ten minutes, and up, if you really want to get serious. So, that’s certainly something that you need to make sure that you have is a decent mount that will track the sky. I’d also mention that the optics are very important. A lot of the smaller telescopes that you can get decent wide field shots, you tend to see that with refractors instead of reflectors--typically that’s because refractors, you’re able to make the glass better quality than you can make the mirror on a small reflector. So the one tradeoff is you’re then paying more for the lenses, so my smallest telescope for instance is just an Astro-Tech refractor, and it’s what’s called apochromatic. It’s only 66mm across, but it gets me beautiful wide-range shots of the sky.

KK: Obviously there are a lot of things to think about as you get involved in this. But, if somebody were just getting into this, maybe a younger person, and they had a limited budget that they would be able to put forth on this venture of getting inolved in astrophotography. Let’s assume they already have a reasonable reflector or a reasonable refractor that they can use for this. With a motorized mount that is going to track the stars as you already said... which is, I think, many serious amateur astronomers of all ages would probably have a setup at least like that. What’s left then is the adapter to get the camera into the eyepiece; are there any other substantial hardware outlays, assuming they had that much besides what I think you called the T-adapter?

JB: So, yeah, there’s not any major extra things that you’d sort of have to purchase. There’s lots of little perks that you can get. This is just to sort of take the intermediate level shots, so not the ones that are going to featured by NASA or anything like that. But, just stuff to take of your own, so you’ll probably want to get a cable release for your camera, and assuming you have like a laptop that you can take out to the field, having the ability to connect your camera to your laptop is very useful--especially for doing, you know, longer bulb exposures.

KK: So let me ask you this, Joe, about what you will actually see when you start doing astrophotography. Everyone is aware when they look up at the stars that they’re looking at a wide variety of colors, for example, that the stars are supposed to possess. That being said, really, the gradations in color are very, sort of, subtle, when you’re standing there on the ground using your eyes to look at the stars. And you know the richness of, for example, the Orion Nebula that you see in the books and online--you don’t see anything like that with the kind of observations you do with your eyes...often times even with the telescope. When you start taking longer exposures with astrophotography, do you start seeing those stark contrasts and colors and some of those things that you’re used to seeing, or is that really a function of filtering what the camera sees or something like that?

JB: You definitely see an effect by taking longer exposures. So the issue is when you’re looking at it with your eye, that’s basically the equivalent of taking a fraction of a second image that’s being done with your eye in place of a camera. And, you know, it’s being transmitted to your brain and typically you’re not able to see anywhere near the color that you can get when you do a long exposure. So, you can see color in galaxies and things like that whereas optically, if I look at a galaxy, I’m lucky---you know everything is basically shades of gray. And the only things that really exhibit any color in the sky, you know, stars sometimes exhibit color, especially if they’re particularly bright, and, the planets certainly exhibit color, but you know in part that’s just because they’re a lot brighter and they are a lot closer than these big galaxies. So, the more the you expose, the better of a shot that you’re going to get within certain limits. You can’t just take a one hour exposure and, you know, expect for it to be spectacular without having to do a lot of extra work.

KK: OK, so, Joe I want to move on to this very interesting trip that you’ve recently come back from to Kitt Peak. Before we do that, if somebody’s interest has already been piqued by what you’ve said, and they want to think about getting started in astrophotography, there’s got to be some kind of a web page resource out there that is a good starting point, a good jumping-off point for people to learn more about that at their own pace. Maybe you can tell us what some of the resources are for that?

JB: Yeah sure, so, a good site to go to, if you go to skyandtelescope.com, and sort of browse around on that site, there’s plenty of both articles and just I think they even have an entire astrophotography section. On top of that, you can sort of, just google “how to get started in astrophotography”. So, lots of people have sort of set up websites on how to do this. We haven’t even touched on things like you can even use a webcam to do astrophotography; there’s also more advanced techniques like using CCD cameras, and those produce some of the real eye-opener pictures. But, yes, there’s a very wide community online that deals with this, and just about anything that you might want to get interested in there’s also probably a Yahoo! group around it. So, that’s sort of the forum where you can ask questions and try to figure out, you know, what you’re doing wrong, or, what you need to be doing...

KK: So, at some point, you became more than just a beginning astrophotographer. You became interested enough in it that you’ve actually gone and done some of the more advanced things that can be done with astrophotography by amateurs. So, I guess you went for a whole week to Kitt Peak, Arizona, where you were able to use some of that equipment over there with, in conjunction with your photography equipment to take some really spectacular photos that we’re going to tell people where they can see some of those photos. But, how does that work? How many observatories offer a service like that? How much does it cost? What does it take to get involved in that, and what you are getting, what is the difference when you go and do something like that?

JB: I first found out about this program down at Kitt Peak through a friend of mine whose sort of my mentor when it comes to getting into astronomy, and, he takes spectacular images and he basically just wanted to go down there to learn to use his CCD camera. So, he found out about this program that Kitt Peak runs called the Advanced Observer Program. So, the basic premise is it’s just you, and a guide, and one of the telescopes at Kitt Peak just all night long. And you can do whatever you want with them. They have people that want to do visual observing, they have people like me who want to go down and take a bunch of photos with a digital SLR. There’s also people like my friend that just want to learn how to use a CCD camera, and they may spend the entire night there and only get maybe two shots, two actual images out, but, the images are the type of things that you want to set as the wallpaper on your computer they’re so fantastic. So, in this case, Kitt Peak is an observatory down near Tucson, Arizona, it’s maybe 50 miles to the west of it. It is some of the darkest skies in the entire country. So, we haven’t really touched on this yet but where I live near Washington, DC, we get an awful lot of light pollution just from the city of DC and Baltimore and lots of other little towns nearby, so that, you know even driving thirty minutes out of town, you’re still not even close to what you need to do really serious astrophotography--the things where you’re talking like ten minute exposure just because the background brightness of the sky is so much that it kind of blows out your image. So Kitt Peak is close to as dark as you’re going to get in the continental United States. So they offer this program--so the cost of the program itself is $550, on top of that there’s a $150 fee for--so you get to stay in a dorm the next night--so the $550 covers up to two people, so you can bring a friend, so I went with my brother once and with a friend just this last time. So, you go there, you sort of stay up all night with the telescope, and then you sleep for a couple of hours during the day in the dorm. The views are spectacular up there, you’re about 7000 ft above sea level there, so you can see Tucson from there, you can see into Mexico. It’s just lots of very pretty mountainous territory. On top of that, Kitt Peak is also a pretty decent location for doing regular astronomy, so they have dozens of telescopes, each of which is doing a very specific type of mission so they have things doing variable stars, and asteroids, and gamma ray bursts, and just about anything that you can think of up there. So, while you’re there, you would be able to tour a couple of the bigger telescopes, so they have a solar telescope, and then a telescope with a two meter mirror, and another one with a four meter mirror, it used to be one of the biggest in the world...so right now it’s somewhere around thirtieth largest [it’s actually 27th, and is called the Nicholas U. Mayall 4 meter. I looked it up. -KK] . As to what other places might offer something like this, I believe there’s something similar on Mt. Lemmon [Observatory], down near Tucson. So this was started by somebody that used to be at Kitt Peak. But aside from that, there are not very many other locations in very good dark sites at famous observatories, where you, where it’s just going to be you and a guide all night doing some sort of amateur astronomy. There’s certainly places like the Keck Telescope out in Hawaii, but typically to get to use that, you have to be a serious researcher with funding. So there, you’re talking like tens of thousands of dollars to observe on it as opposed to just a few hundred.

KK: I see, that’s interesting. So, if anybody was going to make the step up to taking shots like that with real impressive telescopic equipment, Kitt Peak is really your main viable option?

JB: Yes, it’s definitely the premier place for taking astrophotography. I think you really want to get to a good dark site, and Kitt Peak is sort of set up for that. They have the telescopes, they have the cameras, you can bring your own camera if you like. I actually borrowed one of these Astro-Tracs from a friend, and outside I was just taking pictures of the night sky. So I took Milky Way shots, and wide field shots, using just my regular Canon [EOS Rebel] T2i, and then, so the telescope that I actually got to use, they have a twenty inch Ritchie-Chretien telescope. I actually didn’t use that at all for taking pictures, but I used the finder scope on it, which is a Takahashi [Seisakusho] 106mm FSQ, which is one of the finest refractors ever made. So I got to take pictures through that with a Canon [EOS] 60Da, so this is a relatively new camera, that was specifically designed by Canon with astronomy in mind. So, it has increased sensitivity in infra-red and various other wavelengths. So, when you take pictures--some of the redder objects in the sky show up even redder than they would with a normal digital SLR, just thanks to this camera. So it was a fantastic experience!

KK: That’s interesting. And you’ve done it twice?

JB: Yes, the first time I went was in October of 2011, and then I decided to go again in April of this year--of 2013--and so by doing that, since each time I go I’m basically staying up the entire night, you end up seeing essentially the entire sky.

KK: I guess I was one of the first to see the results of your labors this last time. So let me tell people where they can see what you’ve done. Dr. Bohanon has a web site at joebohanon.com. So he has a web site there, and there is a number of resources there. Joe, like I said, is a mathematician, so there’s a little bit of math up there, but the bulk of the website is astronomy related, and quite a bit of astrophotography on there. At the top of the site you will see a button for Kitt Peak, and Joe had just recently put that up there for anyone listening to the podcast. If you click that button, you will be able to see several dozen--some of the pictures that Joe was able to take on this trip to Kitt Peak. And, if you poke around on the web site, you can see some of his other work, that he’s just taken, from various reasonable locations around here with the equipment that he has. So, that website’s got a lot of stuff on it. So, Joe, let’s say that there’s another amateur astrophotographer that wants to show you some of his work, or let’s say there’s somebody out there interested in getting involved, or a young person that wants to talk to you about this. They can send you an email I’m sure. That would be joe at joebohanon dot com yes?

JB: That is correct.

KK: You don’t mind receiving emails? You have no problem at all with that, right?

JB: No, I’m happy to help with somebody that’s interested in getting into astrophotography.

KK: OK great. Is there anything else that you want to add for people interested in this topic, Joe?

JB: So I mentioned if you just google “advanced observing program”, you should be able to find a link to the Kitt Peak web site, and, they have more information if you’d like to set up a night like this. Like I mentioned, if you want to just go and look through the telescope, you can do that the entire night. You don’t even have to bring an observing list. The guides there are very knowledgable, you can just say show me the best stuff there is to see, and they’ll be able to keep you occupied all night long. So that’s very helpful. I guess I’d also mention you do have some minor issues with the weather. So, the weather doesn’t always cooperate with astronomers. The people at Kitt Peak sort of understand that. The worst time to go is anytime in July or August because that’s when monsoon season hits in Arizona, so, it’s usually cloudy and rainy the entire time. Most of the rest of the year, you can expect fairly good weather, so you have a fairly decent chance of being able to go, so it turned out that the week that I was going to go, you sort of have to book these a couple months in advance, so they tell you expect to be down here for a week and find other things to do in the area just so you haven’t wasted a plane ticket if you come out. So I’d been looking at the weather the entire week leading up this. And, I was originally going to go on one night, and the weather looked a little bit better the previous night, so I actually called them a few days earlier, and said, hey, is there anyway we can move this back? And they were able to sort of work around their schedule and make this work for me. So it ended up being a fantastic night while I was down there, and then, the rest of the week I got to see the Grand Canyon and Meteor Crater, so we basically tooled all around the State of Arizona. So, you can see pictures of those on my blog as well, too.

KK: We’ve been talking for a long time about astrophotography and it’s all been very interesting. Hopefully, if anyone is interested in the topic, that this introduction has been enough for them to get started. By all means definitely check out Dr. Bohanon’s site; there’s just filled with very very nice photographs and other information about astronomy and certainly anybody listening to this podcast should find a lot to recommend on that site. And so thank you for your time Joe; it’s the kind of topic you don’t hear very much on this podcast. I’m glad you’ve been able to give a little bit of an introduction.

JB: Sure, thanks for having me!

Episode for 4 May, 2013 - Cheap Astronomy: "Live at Mt Stromlo"

Sat, 04 May 2013 11:00:00 +0000

Episode for 3 May, 2013 - Weekly Space Hangout

Fri, 03 May 2013 11:00:00 +0000

Episode for 2 May, 2013 - Planetary Society Hangout: NASA's 2014 Budget & Planetary Defense Conference

Thu, 02 May 2013 11:00:00 +0000

Episode for 1 May, 2013 - Learning Space "Touch of the Universe"

Wed, 01 May 2013 19:17:31 +0000

Episode for 30 April, 2013 - NLSI "The Moon is a Survivor"

Tue, 30 Apr 2013 11:00:00 +0000

Summary: We know that the Moon has been the victim of countless impacts during its history, where the surface has been pummeled and sometimes turned to liquid from the heat of impacts. This hot liquid lava would mix with minerals from the impactor, changing the surface make-up of the Moon. But new research has shown that lunar impacts may not have completely wiped away the pre-existing mineralogy on the Moon. Deepak Dhingra, a Graduate Student in Planetary Geosciences at Brown University, joins today's podcast. He is the lead author of a recent paper published in the in the journal Geophysical Research Letters.

Press release from Brown University: http://news.brown.edu/pressreleases/2013/04/survivor

Organization: NASA Lunar Science Institute (NLSI) – http://lunarscience.arc.nasa.gov/

Music: "Amelia" by Ben Bedford from his "Land of the Shadows" CD. http://benbedford.com/

Bios: The NLSI brings together leading lunar scientists from around the world to further NASA lunar science and exploration.

Deepak Dhingra is a Graduate Student in Planetary Geosciences at Brown University.

Nancy Atkinson is a science journalist and is senior editor of Universe Today: http://www.universetoday.com

Episode for 29 April, 2013 - AstronomyCast "Observable Universe"

Mon, 29 Apr 2013 11:00:00 +0000

Episode 28 April, 2013 - "Monthly News Roundup"

Sun, 28 Apr 2013 11:00:00 +0000

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You’re listening to the 365 Days of Astronomy Podcast for April 28th, 2013. I’m Morgan Rehnberg and this is the Monthly News Roundup. This episode was produced by Cosmic Chatter and recorded April 24th from Boulder, Colorado.

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Let’s start this month with a trip to the International Space Station. Orbiting more than four hundred kilometers above the surface of the Earth, the ISS is our only continuously-manned outpost in space. With a cost exceeding 150 billion dollars, it’s also the most expensive project in human history. Given this, there has always been enormous pressure to generate scientific results from this orbiting laboratory. While many experiments have been conducted, particularly in the biology of living in space, there’s never been a headline-grabbing result. That may have changed this month with the possible discovery of signs of dark matter.

Dark matter is one of the great unsolved mysteries of modern physics. Although scientists have never observed it, we think that there is about five times more dark matter in the Universe than ordinary matter. Dark matter is so difficult to detect because it doesn’t interact with light - our principal tool for studying the cosmos. Instead, we can only infer its existence indirectly. For example, galaxies seem to have much more mass than is accounted for in all the matter we can see. This causes the galaxy to rotate more quickly than it otherwise would.

What’s really needed is a so-called “smoking gun experiment” - an experiment that reveals results that cannot be predicted by our existing understanding of physics. This latest project goes a long way in that direction. Called the Alpha Magnetic Spectrometer, this instrument detects a rare particle known as a positron. Positrons are a kind of antimatter, in this case, the anti-electron. It has all the same properties as the electron, but instead of a negative charge, it carries a positive one.

It’s predicted than when particles of dark matter collide, they release a shower of positrons, which are eventually collected and measured by the Alpha Magnetic Spectrometer. Since its launch in 2011, the experiment has detected more than 400,000 of these events. The only problem is, another astronomical phenomenon, the pulsar, can produce positrons which look similar to those from dark matter collisions. For the instrument to be able to tell these events apart, it needs more than two years of data.

Fortunately, the Alpha Magnetic Spectrometer will continue to operate until the retirement of the International Space Station, which is at least seven years away. By then, we’ll hopefully have our first solid evidence that the mysterious dark matter actually exists.

http://science.nasa.gov/science-news/science-at-nasa/2013/14apr_ams/

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From an Earth-orbiting space station, let’s turn to some Earth-like planets. Scientists with the Kepler mission announced this month the discovery of a trio of worlds which could support life. The three planets are so-called super-Earths, because they’re about one and a half times the size of our world. Known as Kepler 62e, Kepler 62f, and Kepler 69c, these planets all orbit stars which are less than a quarter as bright as the Sun. They’re in the habitable zone because they orbit closer to their stars than we do to the Sun, allowing them to receive additional heat.

What might these alien worlds look like? Because they’re so small and far away, we can only speculate. A model released in conjunction with this announcement, however, suggests that at least two might be covered entirely by water. Determinations like this are usually made by examining a planet’s temperature and density. Water is less dense than rock, so if a planet seems fluffier than normal, it probably has a substantial portion of water. If that planet is warm, like these, this water is probably liquid. If the temperatures are too low, it’s likely covered in ice.

Water worlds are especially exciting to astrobiologists, because many scientists believe that life here on the Earth began in the oceans. The oceans act as a giant mixing bowl, stirring together the various organic molecules which form all life on Earth. Over billions of years, these molecules bump together until they happen to form the earliest cells.

These cells could eventually form more complex life, but could a technological civilization like ours ever exist on a water world? It seems doubtful. The foundation of nearly all our technology is fire. It heats our homes, cooks our food, and powers our machinery. A planet covered in ocean hardly seems hospitable to fire.

Regardless of whether these planets actually support life, it’s thrilling that we’re finding more and more of them that could. With every discovery, the universe seems a little less sterile and a little more friendly.

http://www.space.com/20720-earth-like-alien-planets-discovery.html

http://www.pbs.org/newshour/rundown/2013/04/kepler-discovers-two-earth-size-planets.html

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Ever think that the Earth was the only planet in our solar system to have rain? Think again - scientists have found evidence of rain on Venus, Mars, and Titan - and now you can add Saturn to this list. Unlike all these other worlds, however, Saturn’s rain has a unique source. Rather than falling out of atmospheric clouds, rain on Saturn seems to come from its beautiful rings.

The rings are composed of nearly perfectly pure water ice and now it seems that some of that ice escapes and falls onto the planet itself. How does this work? Astronomers aren’t really sure. Somehow, small chips of ice are knocked off the larger chunks which make up the ring, perhaps through collisions. But in the absence of gravity, how do these chips fall onto the planet? The answer seems to lie in magnetic fields. If these fragments have an electric charge, they get caught up by Saturn’s magnetic field and dragged along through space. Eventually this field must reconnect with the planet, and the ice particles follow along, where they rain down on the gaseous upper layers of Saturn.

If this explanation proves correct, it could open the door for additional magnetic effects. Saturn’s magnetic field is relatively weak, about five perfect the strength of Jupiter’s and a little weaker than the Earth’s. Because of this, most structure in the rings has been attributed to the gravitational effects of the planet’s many moons. Maybe, however, some properties of the rings are affected by the magnetic field. With the Cassini spacecraft expected to orbit Saturn for another four years, we might not be that far from finding out.

http://www.nasa.gov/mission_pages/cassini/whycassini/cassini20130410.html

http://www.space.com/20595-saturn-rings-rain-water.html

#####

While it was raining on Saturn, it was spring break on Mars. Every two years, Mars and the Sun reach what’s called conjunction. This means that, as seen from Earth, they’re as close together in the sky as they ever get. The Sun is a lot bigger than Mars, so it actually blocks it from our view for about a month. While this is sad news for skygazers, it’s also a bump in the road for Mars exploration.

We currently have five spacecraft at Mars. Three, Mars Reconnaissance Orbiter, Mars Express, and Mars Odyssey, are in orbit. Curiosity and its older sibling Opportunity are on the surface. All of them are in daily contact with engineers and scientists here on Earth. These communications are carried through the Deep Space Network, which uses a series of giant radio dishes to transmit and receive information from all over the solar system. When the Sun blocks Mars, however, it cuts the red planet off from this network. This means that for nearly all of April, spacecraft at Mars were out of contact with Earth.

If you’re a satellite in orbit, you’re pretty safe, and all three Mars orbiters have been carrying out pre-programmed tasks all month. On the ground, things are a bit more tricky. Although the rovers do have the capability to steer themselves around obstacles, if they were to get stuck they’d have no way to call for help. Instead, they’ve spent the month performing stationary experiments. Curiosity has spent her time measuring the water content of the nearby soil, while Opportunity has made atmospheric dust measurements and studied a rock.

When Mars emerges from the Sun’s shadow at the beginning of May, all this collected data will be returned to Earth for study. Then it will be time to get back to work, and not just for the spacecraft. Many engineers and scientists also used this downtime to schedule their own, much-needed vacations.

http://cosmicchatter.org/blog/0034-mars-spacecraft-slip-behind-the-sun

#####

Supernovae are relatively common in the galaxy. On average, a star explodes somewhere in the Milky Way every fifty years. But it’s far less common for one of these massive explosions to be visible to the naked eye. It’s been more than four hundred years, in fact, since that last occurred. Recorded by the famous astronomer Johannes Kepler, supernova 1604 is now better known as Kepler’s Supernova.

This blast was a type 1a supernova, which means that it marked the destruction of an ancient white dwarf star. Kepler’s Supernova is the most easily-observed type 1a supernova, so it’s a valuable tool for astronomers.

What was the star like before it exploded? Physical models can provide some clues, but to get a fuller picture we need to study the aftermath of the explosion itself. A new study has done just that. Using data collected from the Japanese Suzaku x-ray telescope in 2009 and 2011, a group of researchers have reconstructed the composition of this white dwarf.

They detected small amounts of elements like chromium, nickel, and manganese and a larger amount of iron. By comparing these measurements to observations of the Sun, they determined that this star must have had about three times the amount of metals contained in ours. This is curious because older stars typically have fewer metals than recent ones, not more.

With a distance of only about twenty thousand lightyears, the star that led to Kepler’s Supernova was born in our cosmic neighborhood. This means that as we continue to study it, we may also learn more about the history of our own Sun.

http://science.nbcnews.com/_news/2013/04/18/17811219-keplers-supernovas-explosion-comes-into-focus?lite

#####

Do you have astronomical favorites? Maybe your favorite planet is Neptune, your favorite moon Hyperion, your favorite rover Spirit. But do you have a favorite exoplanet? If so, chances are it has a name like HD 38529 Ab. Plenty bland, huh? To try and make these names a bit friendlier, a number of groups have sprung up offering to sell naming rights to recently discovered planets. Astronomy’s governing body, however, has said “no way.”

Most things in astronomy exist in catalogs. With as many as 400 billion stars in our galaxy alone, it’d be impossible to creatively name them all. Let’s take a look at planet HD 38529 Ab. What does this name mean? HD means that the star is located in the Henry Draper star catalog, a catalog of the 225,000 brightest stars as seen from Earth. 38529 is the entry in the catalog. “A” means that this star is a multiple star system and this is the brightest of the stars. “b” means that this is the first planet discovered in the star system, because the star itself is called “Aa.”

So there’s lots of information here, but it’s not very user friendly. That’s okay with astronomy’s governing body, the International Astronomical Union. The IAU is charged with standardizing the notation and terminology used by astronomers worldwide. Best known for demoting Pluto from planethood, they oversee the assignment of names and numbers to newly discovered objects. They mostly want to keep people from getting ripped off by buying planet names. Since scientists will continue to use the IAU-approved names, the buyer really isn’t getting anything for their money.

Although it’s impossible to buy the name for any astronomical object, there is one class of objects which can be named. Anyone who discovers a new asteroid has a certain timeframe to name it as they choose. So, if you want your own name on the Earth’s killer asteroid, you’d better start making friends!

http://blogs.scientificamerican.com/observations/2013/04/12/planet-naming-rights-not-for-sale-says-international-astronomical-union/

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Thanks for listening to this episode of the 365 Days of Astronomy Podcast. For more astronomy news and commentary, visit cosmicchatter.org or follow cosmic_chatter on Twitter. You can send comments and corrections to cosmicchatter@gmail.com. See you in May!

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Episode for 27 April, 2013 - "Weekly Space Hangout"

Sat, 27 Apr 2013 11:00:00 +0000

Episode for 26 April, 2013: NLSI "Missions to the Moon"

Fri, 26 Apr 2013 20:15:18 +0000

Episode for 25 April, 2013 - Planetary Society Hangout "Ice Giants"

Thu, 25 Apr 2013 11:00:00 +0000

Episode for 24 April, 2013: Learning Space - NGSS & NSTA

Wed, 24 Apr 2013 11:00:00 +0000

Episode for 23 April, 2013: MyMoon with Leo Camacho

Wed, 24 Apr 2013 09:07:18 +0000

Episode for 22 April, 2013 - AstronomyCast Arecibo Observatory

Mon, 22 Apr 2013 11:00:00 +0000

365 Days of Astronomy

Episode for 21 April, 2013 : Ask Cheap Astronomy

Sun, 21 Apr 2013 11:00:00 +0000

Episode for 20 April, 2013 - "Windows to the Universe"

Sat, 20 Apr 2013 11:00:00 +0000

Windows to the Universe

Dark skies sites are increasingly rare as the world becomes more urbanized and more nighttime lights are installed. Cerro Tololo Inter-American Observatory’s Malcom Smith has long been interested in preserving dark skies. He is currently working with the United Nations Education, Social and Cultural Organization (UNESCO) to establish Dark Skies Heritage Sites in Hawaii, northern Chile and the Hawaiian Islands. In this podcast, Malcom Smith describes the history of these efforts and their current status.

Rob Sparks is a science education specialist in the Education and Public Outreach (EPO) group at the National Optical Astronomy Observatory (NOAO) and works on the Galileoscope project (www.galileoscope.org), providing design, dissemination and professional development. He blogs at halfastro.wordpress.com.

Malcom Smith is currently an Astronomer at CTIO with some special responsibilities (at local and international level) for controlling light pollution and for Public Affairs and Educational Outreach.

Episode for 19 April, 2013 -- GAM Panel: Overview Effect

Fri, 19 Apr 2013 11:00:00 +0000

Ep. for 18 April, 2013: "Programming in the Sciences"

Thu, 18 Apr 2013 11:00:00 +0000

The Planetary Society Hangout -- "Programming in the Sciences" -- originally recorded via Google+ Hangout on Air on 4 April, 2013.

Episode for 17 April, 2013: GAM Updates

Wed, 17 Apr 2013 18:53:40 +0000

Mike Simmons from Astronomers Without Borders is Pamela Gay and Georgia Bracey's guest on this CosmoQuest Hangout On Air broadcast updating everyone on Global Astronomy Month

365 Days of Astronomy -- 16 April, 2013

Tue, 16 Apr 2013 11:00:00 +0000

365 Days of Astronomy - 15 April, 2013

Mon, 15 Apr 2013 17:29:14 +0000

AstronomyCast - EarthQuakes

365 Days of Astronomy - 14 April, 2013

Sun, 14 Apr 2013 11:00:00 +0000

365 Days of Astronomy - 13 April, 2013

Sat, 13 Apr 2013 11:00:00 +0000

365 Days Of Astronomy - 12 April, 2013

Fri, 12 Apr 2013 09:00:00 +0000

Learning Space - Yuri's Night

365 Days of Astronomy - 11 April, 2013

Thu, 11 Apr 2013 13:53:29 +0000

The Planetary Society Hangout on Air

365 Days of Astronomy - 10 April, 2013

Wed, 10 Apr 2013 09:00:00 +0000

Learning Space with CosmoQuest -- "Astronomy Clubs"

365 Days Of Astronomy - 9 April, 2013

Tue, 09 Apr 2013 09:00:00 +0000

MyMoon/CosmoQuest Hangout On Air with Andy Shaner, Pamela Gay and special guest Will Pomerantz from Virgin Galactic discuss privatized spaceflight and mining asteroids!

Originally Recorded Live on Google+ on 2 April, 2013

365 Days of Astronomy - 8 April, 2013

Mon, 08 Apr 2013 09:00:00 +0000

AstronomyCast -- Oort Cloud

365 Days of Astronomy - 7 April, 2013

Sun, 07 Apr 2013 09:00:00 +0000

Cheap Astronomy -- Celestial Sphere

365 Days of Astronomy - 6 April, 2013

Sat, 06 Apr 2013 09:00:00 +0000

Observing with Webb Podcast

365 Days of Astronomy - 5 April, 2013

Fri, 05 Apr 2013 09:00:00 +0000

CosmoQuest's Weekly Space Hangout

365 Days of Astronomy - 4 April, 2013

Thu, 04 Apr 2013 09:00:00 +0000

The Planetary Society Hangout - "ALMA Observatory & Tracking Astroids with Robert Holmes"

365 Days of Astronomy - 3 April, 2013

Wed, 03 Apr 2013 09:00:00 +0000

Learning Space w/ CosmoQuest -- "NanoGRAV"

365 Days of Astronomy - 2 April, 2013

Tue, 02 Apr 2013 09:00:00 +0000

Podcast title: Dark Skies and Global Astronomy Month

Description: With half of the world’s population now living in cities, many urban dwellers have never experienced the wonderment of pristinely dark skies and maybe never will. This loss, caused by light pollution, is a concern on many fronts: safety, energy conservation, cost, health and effects on wildlife, as well as our ability to view the stars. Even though light pollution is a serious and growing global concern, it is one of the most straightforward environmental problems people can address on local levels. In this podcast, we highlight three of the dark skies related activities for Global Astronomy Month (GAM). The citizen-science light pollution program, GLOBE at Night, will have two campaigns (when the moon is not out from 8pm-10pm): one from March 31^st – April 9 and another from April 29 – May 8. The Earth and Sky Photo Contest is accepting entries through April 22^nd and the International Dark Skies Week is April 5^th – 12^th. Learn how you can participate in these events.

Website(s) you want to have a link to: www.globeatnight.org, www.globeatnight.org/webapp/, www.facebook.com/GLOBEatNight, and twitter.com/GLOBEatNight, www.darksky.org, http://www.darksky.org/resources/109-international-dark-sky-week, www.twanight.org/contest, astrowb.org/gam2013-programs/dark-skies-awareness.html

Twitter Hashtags: #GAM2013 #IDSWeek

Short bio: Rob Sparks is a science education specialist in the Education and Public Outreach (EPO) group at the National Optical Astronomy Observatory (NOAO) and works on the Galileoscope project (www.galileoscope.org), providing design, dissemination and professional development. He also pens a great blog at halfastro.wordpress.com.

Connie Walker is an associate scientist and senior science education specialist in the EPO group at NOAO in Tucson, Arizona. She directs the worldwide citizen science campaign on monitoring night sky brightness called GLOBE at Night (www.globeatnight.org), which has great Facebook and Twitter pages at www.facebook.com/GLOBEatNight, and twitter.com/GLOBEatNight.

Scott Kardel is the Managing Director for the International Dark Sky Association in Tucson, Arizona. Scott oversees International Dark Skies Week.

Babak Tafreshi is the Founder and director of The World At Night as well as an award-winning photographer and board member of Astronomers Without Borders. Babek runs the Earth and Sky Photo Contest.

365 Days of Astronomy - 1 April, 2013

Mon, 01 Apr 2013 16:40:06 +0000

AstronomyCast: Episode 291

365 Days of Astronomy - 31 March, 2013

Sun, 31 Mar 2013 16:56:30 +0000

Cheap Astronomy - Live from Dublin

365 Days of Astronomy - 30 March, 2013

Sat, 30 Mar 2013 09:00:00 +0000

CosmoQuest Science Hour

365 Days of Astronomy - 29 March, 2013

Fri, 29 Mar 2013 09:00:00 +0000

Weekly Space Hangout

365 Days of Astronomy - 28 March, 2013

Thu, 28 Mar 2013 17:45:00 +0000

Planetary Society Hangout

365 Days of Astronomy - 27 March, 2013

Wed, 27 Mar 2013 09:00:00 +0000

Learning Space w/ CosmoQuest

365 Days of Astronomy -- 26 March, 2013

Tue, 26 Mar 2013 09:00:00 +0000

MyMoon & CosmoQuest Hangout On Air

365 Days of Astronomy -- 24 March, 2013

Sun, 24 Mar 2013 09:00:00 +0000

Astronomy Cast: Episode 275

365 Days of Astronomy -- 23 March, 2013

Sat, 23 Mar 2013 09:00:00 +0000

Cheap Astronomy!

365 Days of Astronomy -- 22 March, 2013

Fri, 22 Mar 2013 09:00:00 +0000

Weekly Space Hangout -- Recorded on 15 March, 2013

Scott Lewis and Tony Darnell talk about the James Webb Space Telescope outreach that was performed at South by Southwest in Austin, Texas.

365 Days of Astronomy -- 21 March, 2013

Thu, 21 Mar 2013 09:00:00 +0000

The Planetary Hangout -- Originally Recorded live on 7 March, 2013 "What's going on with Curiosity?" Casey Dreier and Emily Lakdawalla talk about the current happenings with the Mars Science Laboratory.

365 Days of Astronomy -- 20 March, 2013

Wed, 20 Mar 2013 09:00:00 +0000

Nicole Gugliucci hosted a live Google+ Hangout on Air from Chile for the ALMA Large Millimeter Array, interviewing fellow space enthusiasts, technicians and scientists.

Nancy Atkinson - Russian Airblast

Tue, 19 Mar 2013 09:00:00 +0000

365 Days of Astronomy -- 18 March, 2013

Mon, 18 Mar 2013 09:00:00 +0000

AstronomyCast: Episode 289 Cherenkov Radiation

Originally recorded on 28 January, 2013

Podcasters: Fraser Cain and Dr. Pamela Gay

NASA Dawn Hangout With CosmoQuest

Sun, 17 Mar 2013 09:00:00 +0000

Originally Recorded on 11 December, 2012

Hosted by Joe Wise, Education & Public Outreach Manager for the NASA Dawn Mission with Dr. Pamela Gay from CosmoQuest and Jennifer Scully from UCLA as they discuss the science being done on the Dawn mission, Citizen Science project AsteroidMappers which allows the public to research Vesta, and future research being done on Ceres.

Dr. Pamela Gay & Dr. Nicole Gugliucci on STEM Inspiration

Sat, 16 Mar 2013 09:00:00 +0000

Dr. Pamela Gay & Dr. Nicole Gugliucci discuss the women who inspired them to get into the STEM fields over the years. Recorded live from South by Southwest in Austin, Texas on 8 March, 2013 -- International Womens Day

Weekly Space Hangout - 1 March, 2013

Fri, 15 Mar 2013 09:00:00 +0000

Fraser Cain, Nicole Gugliucci, Scott Lewis, Ian O'Neill, Amy Shira Teitel, Jason Major, Nancy Atkinson and special guest Alan Stern discuss the week's space news.

Planetary Hangout -- Asteroids with Andy Rivken

Thu, 14 Mar 2013 09:00:00 +0000

Streamed live on 28 Feb, 2013

Emily Lakdawalla's guest this week was Applied Physics Laboratory asteroid astronomer Andy Rivkin. We talked about the menagerie of rocks in the asteroid belt, how many of them travel in pairs and triples, how some of them are surprisingly wet, and how much you can learn about asteroids using Earth-based telescopes.

Learning Space with CosmoQuest

Wed, 13 Mar 2013 09:00:00 +0000

Originally aired on 27 Feb, 2013.

Weekly Science Hour - 21 Nov, 2012

Wed, 13 Mar 2013 08:28:37 +0000

Emily Lakdawalla of the Planetary Scoiety and Fraser Cain of Universe Today discuss the week's science topics, featuring some unknown news announcement about Mars Science Laboratory's potential findings.

Astronomy Cast -- Phases of Matter

Mon, 11 Mar 2013 11:00:00 +0000

Planetary Society Hangout: Guest Jim Bell

Sun, 10 Mar 2013 19:55:23 +0000

Emily Lakdawalla speaks with head camera man for Spirit and Opportunity Rovers and member of the Curiosity Science Team, Jim Bell. They are joined by Casey Dreier and Bill Nye for a very informative discussion. -- Originally Aired on 3 Jan, 2013 on Google+

CheapAstronomy: Episode 158

Sat, 09 Mar 2013 10:00:00 +0000

"How to colonize a galaxy"

Weekly Space Hangout - 22 February, 2013

Fri, 08 Mar 2013 10:00:00 +0000

Fraser Cain and our rotating round of space journalists and aficionados round up the last week in space news. This week we have Scott Lewis, Alan Boyle, Nancy Atkinson, Ian O'Neill, Amy Shira Teitel, Emily Lakdawalla, Thad Szabo and special guest Heather Hanna to talk about the geological implications of last week's Russian meteor strike

Planetary Hangout - 21 Feb, 2013

Thu, 07 Mar 2013 03:08:35 +0000

Streamed live on Feb 21, 2013

How will the sequester effect NASA's programs and goals? How does the budgeting process normally work? How normal (or abnormal) a situation is this for planning budgets and reaching goals at the U.S. Space Program? We answer all of these questions with Dr. Jon Morse, Professor of Physics at RPI and previous Director of Astrophysics at NASA headquarters in Washington, D.C.

Learning Space with CosmoQuest

Wed, 06 Mar 2013 10:00:00 +0000

Join Dr. Nicole Gugliucci and Dr. Pamela Gay as they discuss the Sky at Night program with Connie Walker and Scott Kardel

Originally aired on 22nd February, 2013 via Google+ Hangout On Air

MyMoon/CosmoQuest Hangout

Tue, 05 Mar 2013 10:00:00 +0000

George is a postdoctoral fellow at the Lunar and Planetary Institute studying the chemistry and mineralology of the Moon, asteroids, and other planetary surfaces. Her research includes lunar swirls and the magma ocean hypothesis! Find out how she became involved in planetary science, and how she selects her research topics ... or how they select her.

Cheap Astronomy -- "Quantum Vacuum"

Mon, 04 Mar 2013 11:17:56 +0000

This episode of Cheap Astronomy discusses virtual particles in space and the question of whether virtual particles actually exist in a way that interacts with real matter.

Observing with Webb -- March 2013

Mon, 04 Mar 2013 11:16:13 +0000

Rob Webb speaks on the month of March's astronomical events including the first day of astronomical spring, comets, the moon and the local planets.

Weekly Space Hangout - 15 February, 2013

Mon, 04 Mar 2013 11:13:30 +0000

Fraser Cain of UniverseToday.com, Nicole Gugliucci of NoisyAstronomer.com, Thad Szabo of Cerritos College, Scott Lewis of KnowTheCosmos.com, Nancy Atkinson of UniverseToday.com, Ian O'Neill of Space.Discovery.com, and Pamela Gay of CosmoQuest.org get together to discuss the week's space news, focusing on the recent Russian meteor impact.

The Planetary Society Hangout

Mon, 04 Mar 2013 11:09:29 +0000

Emily Lakdawalla and Courtney Dressing talked about just how common Earth-sized exoplanets may be in our neighborhood.

Originally Aired on 15 February, 2013

AstronomyCast -- E=mc^2

Mon, 04 Mar 2013 10:00:00 +0000

Fraser Cain and Dr. Pamela Gay discuss Einstein's famous formula: E = mc^2, along with its implications on matter and energy.

Learning Space -- Galileoscope

Wed, 27 Feb 2013 10:00:00 +0000

Nicole Gugliucci of CosmoQuest talks with Robert Sparks about the Galileoscope project, the effects of air on observing astronomical objects through the telescope and more! Originally recorded on 06 February, 2013

Thomas Hofstaetter

Tue, 26 Feb 2013 10:00:00 +0000

Encore Presentation of previous 365 Days of Astronomy Podcast.

AstronomyCast - Episode 286: Debunking Doomsday Myths

Mon, 25 Feb 2013 10:00:00 +0000

Dr. Pamela Gay and Fraser Cain discuss how to debunk End-of-the-world myths in this episode of AstronomyCast, recorded on 24 December, 2012 on "Not the End of the World Cruise".

Weekly Science Hour -- Guest: Alan Stern

Sun, 24 Feb 2013 13:33:35 +0000

Pamela Gay hosts CosmoQuest's Weekly Science Hour Hangout on Air with guest Alan Stern to talk about Uwingu and a new way to fund space science.

Astronomy Cast - Seasons

Sat, 23 Feb 2013 10:00:00 +0000

Fraser Cain and Pamela Gay discuss the true reasons for the seasons in this episode of Astronomy Cast.

Weekly Space Hangout - 08 February, 2013

Fri, 22 Feb 2013 10:00:00 +0000

A group of astronomy journalists get together to discuss current events in space science and astronomy!

The Planetary Society Hangout -- Ice and Snow on Mars

Thu, 21 Feb 2013 10:00:00 +0000

Casey Dreier of The Planetary Society from Pasadena California is joined by Paul Hayne to discuss ice and snow on the planet Mars. This was originally a Google+ Hangout On Air that broadcast live on the 7th of February, 2013.

Learning Space with CosmoQuest -- Children's Books

Wed, 20 Feb 2013 10:00:00 +0000

Nicole Gugliucci and Georgia Bracey from Southern Illinois University - Edwardsville join us from CosmoQuest with guests Joleen Carlberg from Carnegie Institute of Washington and Rachael Beaton of University of Virginia. Together the four of them will discuss astronomy books for children, as well as one that was created by the group "Dark Skies Bright Kids" from University of Virginia.

CosmoQuest, MyMoon and Moon Express

Tue, 19 Feb 2013 10:00:00 +0000

Pamela Gay of CosmoQuest and Andy Shaner of MyMoon discuss Moon Express's current goal of going back to the Moon! Joined by Moon Express engineer Mike Vergalla, the three discuss the exciting journey this private company is taking in order to get back to our lovely satelite.

365 Days of Astronomy - 18 Feb, 2013

Mon, 18 Feb 2013 10:00:00 +0000

AstronomyCast - Episode 285

"Have you checked out the internet lately? Apparently there is some kind of rogue planet causing pole alignment and a killer solar flare that will set off a chain reaction turning the whole universe into strange-matter……. after an alien invasion."

Monthly News Roundup, by Morgan Rehnberg

Mon, 31 Dec 2012 13:30:09 +0000

Monthly News Roundup, by Morgan Rehnberg

Encore: What Were the First Celestial Objects, by Stuart Clark

Sun, 30 Dec 2012 06:00:00 +0000

Encore: What Were the First Celestial Objects, by Stuart Clark

Mars Desert Research Station, by Diane Turnshek

Sat, 29 Dec 2012 08:24:44 +0000

Mars Desert Research Station, by Diane Turnshek

GRAIL, by Nancy Atkinson - NLSI

Fri, 28 Dec 2012 06:48:05 +0000

GRAIL, by Nancy Atkinson - NLSI

Physicist Kip Thorne Tells How Carl Sagan Opened a Wormhole, by Mat Kaplan / The Planetary Society

Thu, 27 Dec 2012 07:18:43 +0000

Physicist Kip Thorne Tells How Carl Sagan Opened a Wormhole, by Mat Kaplan / The Planetary Society

Winter Night Sky Highlights, by Katie Peterson / Adler Planetarium

Wed, 26 Dec 2012 06:00:00 +0000

Winter Night Sky Highlights, by Katie Peterson / Adler Planetarium

Astronomy Word of the Week : Wolf-Rayet, by Christopher Crockett

Wed, 26 Dec 2012 03:59:23 +0000

Astronomy Word of the Week : Wolf-Rayet, by Christopher Crockett

NASA Spinoffs: From Andy Warhol to Stem Cells, by McKenna

Mon, 24 Dec 2012 06:00:00 +0000

NASA Spinoffs: From Andy Warhol to Stem Cells, by McKenna

Encore: CMB: Origin of the Universe, by Thomas Hofstätter

Sun, 23 Dec 2012 06:00:00 +0000

Encore: CMB: Origin of the Universe, by Thomas Hofstätter

Encore: Impact! by Megan Argo

Sat, 22 Dec 2012 22:39:08 +0000

Encore: Impact! by Megan Argo

Superluminal Motion, by Steve Nerlich

Fri, 21 Dec 2012 06:00:00 +0000

Superluminal Motion, by Steve Nerlich

GRAIL: A Smashing Success, by the NASA Lunar Science Institute

Thu, 20 Dec 2012 06:47:13 +0000

GRAIL: A Smashing Success, by the NASA Lunar Science Institute

The Value of Edutainment - Creating Simple Video Games for Space Education, by Tyler Yohe

Wed, 19 Dec 2012 06:25:06 +0000

The Value of Edutainment - Creating Simple Video Games for Space Education, by Tyler Yohe

Astronomy Word of the Week: Parsec, by Christopher Crockett

Tue, 18 Dec 2012 06:00:00 +0000

Astronomy Word of the Week: Parsec, by Christopher Crockett

The Dark Skies Crusader Retires! GLOBE at Night Returns! by Connie Walker

Mon, 17 Dec 2012 06:08:43 +0000

The Dark Skies Crusader Retires! GLOBE at Night Returns! by Connie Walker

Encore: Dr. Debunko, by Mark W. and Katie from Adler Planetarium, also joined by Dr. Mark Hammergren

Sun, 16 Dec 2012 06:00:00 +0000

Encore: Dr. Debunko, by Mark W. and Katie from Adler Planetarium, also joined by Dr. Mark Hammergren

Encore: The Science of Sunshine, by Rob Berthiaume

Sun, 16 Dec 2012 01:05:19 +0000

Encore: The Science of Sunshine, by Rob Berthiaume

Testing Einstein, by Cheap Astronomy

Fri, 14 Dec 2012 06:41:55 +0000

Testing Einstein, by Cheap Astronomy

All about 2 inch Eyepiece, by Joe Lalumia The Telescopeman

Thu, 13 Dec 2012 06:02:26 +0000

All about 2 inch Eyepiece, by Joe Lalumia The Telescopeman

Astronomy Word of the Week : CME, by Christopher Crockett

Wed, 12 Dec 2012 07:07:15 +0000

Astronomy Word of the Week : CME, by Christopher Crockett

Applying for Time on NOAO, by Rob Sparks/NOAO

Wed, 12 Dec 2012 07:05:52 +0000

Applying for Time on NOAO, by Rob Sparks/NOAO

Ice and Organic Goo On Mercury, by Bob Hirshon, AAAS

Mon, 10 Dec 2012 06:09:03 +0000

Ice and Organic Goo On Mercury, by Bob Hirshon, AAAS

Encore: Life on Titan, by Chris Impey

Sun, 09 Dec 2012 06:00:00 +0000

Encore: Life on Titan, by Chris Impey

Encore: Was Einstein Correct? by Stuart Clark

Sun, 09 Dec 2012 00:18:20 +0000

Encore: Was Einstein Correct? by Stuart Clark

Observing With Webb in December 2012, by Rob Webb

Fri, 07 Dec 2012 06:33:58 +0000

Observing With Webb in December 2012, by Rob Webb

Dear Cheap Astronomy - Episode 3, by Steve Nerlich

Thu, 06 Dec 2012 06:23:49 +0000

Dear Cheap Astronomy - Episode 3, by Steve Nerlich

A New Way to Explore the Lunar Farside, by the NASA Lunar Science Institute

Wed, 05 Dec 2012 06:18:22 +0000

A New Way to Explore the Lunar Farside, by the NASA Lunar Science Institute

Astronomy Word of the Week : Retrograde, by Christopher Crockett

Tue, 04 Dec 2012 06:49:25 +0000

Astronomy Word of the Week : Retrograde, by Christopher Crockett

Astronomers Without Borders Helps Open the Universe, by April Jubett, Kimberly Arcand, Amelia Ortiz-Gil

Mon, 03 Dec 2012 06:00:00 +0000

Astronomers Without Borders Helps Open the Universe, by April Jubett, Kimberly Arcand, Amelia Ortiz-Gil

Encore: The Truth in Science and Astronomy, by Elmar von Agris, Castrop-Rauxel

Sun, 02 Dec 2012 06:00:00 +0000

Encore: The Truth in Science and Astronomy, by Elmar von Agris, Castrop-Rauxel

Encore: Life in the Universe: Odds and Expectations, by André Gonçalves

Sun, 02 Dec 2012 00:19:23 +0000

Encore: Life in the Universe: Odds and Expectations, by André Gonçalves

Eyepieces, by Joe Lalumia the TelescopeMan

Fri, 30 Nov 2012 06:00:00 +0000

Eyepieces, by Joe Lalumia the TelescopeMan

Infinite Visions: What Planetary Scientists Would Like to See Happen Next, by Mat Kaplan / The Planetary Society

Thu, 29 Nov 2012 07:13:29 +0000

Infinite Visions: What Planetary Scientists Would Like to See Happen Next, by Mat Kaplan / The Planetary Society

Monthly News Roundup - A Month for Misfits, by Morgan Rehnberg

Wed, 28 Nov 2012 06:00:00 +0000

Monthly News Roundup - A Month for Misfits, by Morgan Rehnberg

Astronomy Word of the Week : ISM, by Christopher Crockett

Tue, 27 Nov 2012 06:13:15 +0000

Astronomy Word of the Week : ISM, by Christopher Crockett

Encore: Questions of a Stellar Nature, by Peter Clark, Robert Simpson and Hannah Hutchins

Mon, 26 Nov 2012 06:00:00 +0000

Encore: Questions of a Stellar Nature, by Peter Clark, Robert Simpson and Hannah Hutchins

Encore: Stars at a Glance, by Thomas Hofstätter and Leon Dombroski

Sun, 25 Nov 2012 06:00:00 +0000

Encore: Stars at a Glance, by Thomas Hofstätter and Leon Dombroski

Encore: The Making of Makemake, by The Ordinary Guy

Sat, 24 Nov 2012 06:00:00 +0000

Encore: The Making of Makemake, by The Ordinary Guy

MESSENGER’s End Game, by Bob Hirshon, AAAS

Fri, 23 Nov 2012 07:54:55 +0000

MESSENGER’s End Game, by Bob Hirshon, AAAS

Jets, by Steve Nerlich

Thu, 22 Nov 2012 09:12:29 +0000

Jets, by Steve Nerlich

Helioseismology, by Christopher Crockett

Wed, 21 Nov 2012 06:24:04 +0000

Helioseismology, by Christopher Crockett

A Look at NASA’s Future Through an Astronaut’s Eyes, by the NASA Lunar Science Institute

Tue, 20 Nov 2012 06:51:53 +0000

A Look at NASA’s Future Through an Astronaut’s Eyes, by the NASA Lunar Science Institute

Encore: Small Worlds Parallax, by Springfield Renaissance School

Mon, 19 Nov 2012 06:00:00 +0000

Encore: Small Worlds Parallax, by Springfield Renaissance School

Encore: Oh Be A Fine Girl, Kiss Me… by Chris Marr

Sun, 18 Nov 2012 06:00:00 +0000

Encore: Oh Be A Fine Girl, Kiss Me… by Chris Marr

Encore: The Life of Stars – A View of Orion, by L. Cate Kendall

Sat, 17 Nov 2012 08:29:29 +0000

Encore: The Life of Stars – A View of Orion, by L. Cate Kendall

The Jewel in the Harp, by Rapid Eye

Fri, 16 Nov 2012 06:00:00 +0000

The Jewel in the Harp, by Rapid Eye

Collimation is Easy, by Joe Lalumia

Thu, 15 Nov 2012 07:18:14 +0000

Collimation is Easy, by Joe Lalumia

Encore: Historical Maps of Solar Eclipses from 1654 to Today, by Michael Zeiler

Wed, 14 Nov 2012 06:10:59 +0000

Encore: Historical Maps of Solar Eclipses from 1654 to Today, by Michael Zeiler

Interview with Chuck Dugan, NOAO, by Rob Sparks/NOAO

Tue, 13 Nov 2012 06:00:00 +0000

Interview with Chuck Dugan, NOAO, by Rob Sparks/NOAO

Fixing Hubble, by Steve Nerlich

Mon, 12 Nov 2012 06:37:08 +0000

Fixing Hubble, by Steve Nerlich

Encore: The Truth in Science and Astronomy, by Elmar von Agris, Castrop-Rauxel, Germany

Sun, 11 Nov 2012 06:00:00 +0000

Encore: The Truth in Science and Astronomy, by Elmar von Agris, Castrop-Rauxel, Germany

Encore: Wolf-Rayet Stars, by RapidEye

Sat, 10 Nov 2012 19:01:48 +0000

Encore: Wolf-Rayet Stars, by RapidEye

Interview with Dr. Pamela Gay, by Avivah Yamani

Fri, 09 Nov 2012 06:39:23 +0000

Interview with Dr. Pamela Gay, by Avivah Yamani

Encore: Blue Star Blues, by Mel Blake, Ashley Wills and Cara Depew

Thu, 08 Nov 2012 06:00:00 +0000

Encore: Blue Star Blues, by Mel Blake, Ashley Wills and Cara Depew

SEAYAC, by Rogel Mari Sese

Wed, 07 Nov 2012 07:23:22 +0000

SEAYAC, by Rogel Mari Sese

Encore: Cataclysmic Variables, by Mike Simonsen, Virginia Renehan, and Rebecca Turner of AAVSO

Tue, 06 Nov 2012 06:00:00 +0000

Encore: Cataclysmic Variables, by Mike Simonsen, Virginia Renehan, and Rebecca Turner of AAVSO

A New Spin on the Moon's Formation, by the NASA Lunar Science Institute

Mon, 05 Nov 2012 06:00:00 +0000

A New Spin on the Moon's Formation, by the NASA Lunar Science Institute

Encore:My Favorite Things? Getting Astronomy on Your Children’s Favorites List, by Patrick McQuillan with help from Connor and Ryan McQuillan

Sun, 04 Nov 2012 05:00:00 +0000

Encore:My Favorite Things? Getting Astronomy on Your Children’s Favorites List, by Patrick McQuillan with help from Connor and Ryan McQuillan

Encore: Echoes from a 430-year-old Supernova, by Robert Knop

Sat, 03 Nov 2012 06:44:20 +0000

Encore: Echoes from a 430-year-old Supernova, by Robert Knop

Observing With Webb in November 2012, by Rob Webb

Fri, 02 Nov 2012 05:00:00 +0000

Observing With Webb in November 2012, by Rob Webb

The Life of a Proton, by Nik Whitehead

Thu, 01 Nov 2012 06:15:29 +0000

The Life of a Proton, by Nik Whitehead

Monthly News Roundup - A New Neighbor, by Morgan Rehnberg

Wed, 31 Oct 2012 05:22:00 +0000

Monthly News Roundup - A New Neighbor, by Morgan Rehnberg

Astronomy Word of the Week : GRB, by Christopher Crockett

Tue, 30 Oct 2012 05:19:09 +0000

Astronomy Word of the Week : GRB, by Christopher Crockett

Panspermia... or not, by Cheap Astronomy

Mon, 29 Oct 2012 05:00:00 +0000

Panspermia... or not, by Cheap Astronomy

Encore: The Moon of Venus, by Ben Lillie

Sun, 28 Oct 2012 05:00:00 +0000

Encore: The Moon of Venus, by Ben Lillie

Encore: A Tale of Two Comets, by Nick Howes

Sat, 27 Oct 2012 20:25:11 +0000

Encore: A Tale of Two Comets, by Nick Howes

Teenagers Exploring the Planets, by Bob Hirshon, AAAS

Fri, 26 Oct 2012 17:17:56 +0000

Teenagers Exploring the Planets, by Bob Hirshon, AAAS

Report on the 44th Annual Meeting of the Division for Planetary Sciences, by Mat Kaplan / The Planetary Society

Thu, 25 Oct 2012 05:56:30 +0000

Report on the 44th Annual Meeting of the Division for Planetary Sciences, by Mat Kaplan / The Planetary Society

Encore: Magnetar the Magnificent, by Carolyn Collins Petersen

Wed, 24 Oct 2012 05:05:47 +0000

Encore: Magnetar the Magnificent, by Carolyn Collins Petersen

Astronomy Word of the Week : Fusion, by Christopher Crockett

Tue, 23 Oct 2012 05:12:06 +0000

Astronomy Word of the Week : Fusion, by Christopher Crockett

Debunking 2012 Doomsday Prophecies with Dr. David Morrison, by the NASA Lunar Science Institute

Mon, 22 Oct 2012 05:11:44 +0000

Debunking 2012 Doomsday Prophecies with Dr. David Morrison, by the NASA Lunar Science Institute

Encore: Disney, Dr. Seuss and the World of Astronomy, by Michelle Meyer, Jacqueline Dennis, and Micol Christopher

Sun, 21 Oct 2012 21:03:35 +0000

Encore: Disney, Dr. Seuss and the World of Astronomy, by Michelle Meyer, Jacqueline Dennis, and Micol Christopher

Encore: Red Fireballs, Quiet Quakes and Heat Haze, by Peter Grego, Alastair McBeath, Ian Morison, Robin Scagell

Sat, 20 Oct 2012 07:23:52 +0000

Encore: Red Fireballs, Quiet Quakes and Heat Haze, by Peter Grego, Alastair McBeath, Ian Morison, Robin Scagell

Encore: Harpooning A Comet, by Bob Hirshon

Fri, 19 Oct 2012 06:03:41 +0000

Encore: Harpooning A Comet, by Bob Hirshon

Cleaning Eyepieces, by Telescope Man

Thu, 18 Oct 2012 05:50:54 +0000

Cleaning Eyepieces, by Telescope Man

Encore: Planet Hunters, by Chris Lintott and Meg Schwamb

Wed, 17 Oct 2012 05:23:50 +0000

Encore: Planet Hunters, by Chris Lintott and Meg Schwamb

Astronomy Word of the Week : Elliptical, by Christopher Crockett

Tue, 16 Oct 2012 05:00:00 +0000

Astronomy Word of the Week : Elliptical, by Christopher Crockett

Encore: Music on a Planetary Scale, by Sandy Antunes

Mon, 15 Oct 2012 05:00:00 +0000

Encore: Music on a Planetary Scale, by Sandy Antunes

Encore: Julius Caesar and the Calendar Reform, by Zachary Kessin and Julia Smith

Sun, 14 Oct 2012 05:00:00 +0000

Encore: Julius Caesar and the Calendar Reform, by Zachary Kessin and Julia Smith

Encore: The Fermi Paradox and The Drake Equation, by Al Ashworth

Sat, 13 Oct 2012 05:00:00 +0000

Encore: The Fermi Paradox and The Drake Equation, by Al Ashworth

The Shape of Space, Pt. 2, by Steve Nerlich

Fri, 12 Oct 2012 05:00:00 +0000

The Shape of Space, Pt. 2, by Steve Nerlich

The Shape of Space, Pt. 1, by Steve Nerlich

Thu, 11 Oct 2012 06:11:00 +0000

The Shape of Space, Pt. 1, by Steve Nerlich

Encore: Why We See The Same Side of the Moon, by Gordon Houston

Wed, 10 Oct 2012 06:38:40 +0000

Encore: Why We See The Same Side of the Moon, by Gordon Houston

The Dark Energy Camera, by Rob Sparks/NOAO

Tue, 09 Oct 2012 05:04:47 +0000

The Dark Energy Camera, by Rob Sparks/NOAO

Starting Astrophotography Hobbies, by TelescopeMan

Mon, 08 Oct 2012 05:00:00 +0000

Starting Astrophotography Hobbies, by TelescopeMan

Encore: Basic Spectroscopy for Amateurs, Pt. 2, by Mark DeVito and Tom Field

Sun, 07 Oct 2012 18:20:44 +0000

Encore: Basic Spectroscopy for Amateurs, Pt. 2, by Mark DeVito and Tom Field

Encore: Basic Spectroscopy for Amateurs, by Mark DeVito

Sat, 06 Oct 2012 06:44:43 +0000

Encore: Basic Spectroscopy for Amateurs, by Mark DeVito

Observing With Webb, by Rob Webb

Fri, 05 Oct 2012 05:00:00 +0000

Observing With Webb, by Rob Webb

Encore: Plans for a Sustainable Lunar Base, by The NASA Lunar Science Institute

Thu, 04 Oct 2012 05:54:08 +0000

Encore: Plans for a Sustainable Lunar Base, by The NASA Lunar Science Institute

Encore: The Connection Between Metal Abundances and the Evolution of Galaxies, by Duane Lee

Wed, 03 Oct 2012 05:00:00 +0000

Encore: The Connection Between Metal Abundances and the Evolution of Galaxies, by Duane Lee

The Universe's Phone Number, by Steve Nerlich

Tue, 02 Oct 2012 05:11:45 +0000

The Universe's Phone Number, by Steve Nerlich

Gravity, by Astronomy For Kids

Mon, 01 Oct 2012 05:10:07 +0000

Gravity, by Astronomy For Kids

Encore: Broken Teeth and the Fate of the Universe, by Ben Lillie

Sun, 30 Sep 2012 05:00:00 +0000

Encore: Broken Teeth and the Fate of the Universe, by Ben Lillie

Encore: Father and Son at the Eyepiece, by Edward Gomez

Sat, 29 Sep 2012 05:00:00 +0000

Encore: Father and Son at the Eyepiece, by Edward Gomez

Monthly News Roundup - A Rocky Month, by Morgan Rehnberg

Fri, 28 Sep 2012 05:00:00 +0000

Monthly News Roundup - A Rocky Month, by Morgan Rehnberg

Talking About the OSIRIS REx Asteroid Sample Return Mission at PATS, by Mat Kaplan / The Planetary Society

Thu, 27 Sep 2012 05:00:00 +0000

Talking About the OSIRIS REx Asteroid Sample Return Mission at PATS, by Mat Kaplan / The Planetary Society

Fall Night Sky Observing Highlights, by Katie Peterson / Adler Planetarium

Wed, 26 Sep 2012 05:00:00 +0000

Fall Night Sky Observing Highlights, by Katie Peterson / Adler Planetarium

Free Astronomy Software, by TelescopeMan

Tue, 25 Sep 2012 05:00:00 +0000

Free Astronomy Software, by TelescopeMan

Encore: Variable Stars and the Stories They Tell, by Mike Simonsen

Tue, 25 Sep 2012 01:39:13 +0000

Encore: Variable Stars and the Stories They Tell, by Mike Simonsen

Encore: Introduction to the Theory and Practice of Jovian Radio Astronomy, by Edgardo Molina

Sun, 23 Sep 2012 05:00:00 +0000

Encore: Introduction to the Theory and Practice of Jovian Radio Astronomy, by Edgardo Molina

Encore: Discovering the Beauty of the Sky, by Alexis Dwyer, Janet Barajas, Drew Olvey, and Micol Christopher

Sat, 22 Sep 2012 16:11:03 +0000

Encore: Discovering the Beauty of the Sky, by Alexis Dwyer, Janet Barajas, Drew Olvey, and Micol Christopher

Math Power! by Bob Hirshon, AAAS

Sat, 22 Sep 2012 16:09:51 +0000

Math Power! by Bob Hirshon, AAAS

International Observe the Moon Night 2012, by the NASA Lunar Science Institute

Thu, 20 Sep 2012 05:11:27 +0000

International Observe the Moon Night 2012, by the NASA Lunar Science Institute

Encore: A Tour through the Lives of the Stars, by André Gonçalves

Wed, 19 Sep 2012 05:00:00 +0000

Encore: A Tour through the Lives of the Stars, by André Gonçalves

How to Align a Finderscope, by Telescopeman

Wed, 19 Sep 2012 04:26:49 +0000

How to Align a Finderscope, by Telescopeman

Astronomy At The Beach, by Stephen Uitti

Mon, 17 Sep 2012 05:00:00 +0000

Astronomy At The Beach, by Stephen Uitti

Encore: The Extraterrestrials in Your Back Yard, by Lia Corrales from Columbia Astronomy

Sun, 16 Sep 2012 08:09:35 +0000

Encore: The Extraterrestrials in Your Back Yard, by Lia Corrales from Columbia Astronomy

Encore: Massive Stars: with Dr. Roberta Humphreys and Dr. Kris Davidson, by Slacker Astronomy

Sat, 15 Sep 2012 05:00:00 +0000

Encore: Massive Stars: with Dr. Roberta Humphreys and Dr. Kris Davidson, by Slacker Astronomy

Galileo Teacher Training Project: a Medium to Introduce Astronomy, by Avivah Yamani

Fri, 14 Sep 2012 05:00:00 +0000

Galileo Teacher Training Project: a Medium to Introduce Astronomy, by Avivah Yamani

TelescopeMan and ATM-ers, by TelescopeMan

Thu, 13 Sep 2012 07:37:23 +0000

TelescopeMan and ATM-ers, by TelescopeMan

Encore: An Introduction to Space Exploration, by Gordon Houston

Wed, 12 Sep 2012 06:27:17 +0000

Encore: An Introduction to Space Exploration, by Gordon Houston

Astronomy Word of the Week : Cepheid, by Christopher Crockett

Wed, 12 Sep 2012 06:19:08 +0000

Astronomy Word of the Week : Cepheid, by Christopher Crockett

BIGBOSS: A New Dark Energy Experiment, by Rob Sparks/NOAO

Tue, 11 Sep 2012 05:00:00 +0000

BIGBOSS: A New Dark Energy Experiment, by Rob Sparks/NOAO

Dear Cheap Astronomy - Episode 2, by Steve Nerlich

Mon, 10 Sep 2012 05:07:14 +0000

Dear Cheap Astronomy - Episode 2, by Steve Nerlich

Encore: An Unexplored World: Dawn Approaches Vesta, by Emily Lakdawalla

Sat, 08 Sep 2012 07:11:42 +0000

Encore: An Unexplored World: Dawn Approaches Vesta, by Emily Lakdawalla

Observing With Webb, by Rob Webb

Fri, 07 Sep 2012 05:00:00 +0000

Observing With Webb, by Rob Webb

Encore: Exploring the Solar System: Asteroid Belt, by Thomas Hofstätter

Thu, 06 Sep 2012 05:19:17 +0000

Encore: Exploring the Solar System: Asteroid Belt, by Thomas Hofstätter

Stunning New Video: From the Earth to the Moon, by NLSI

Wed, 05 Sep 2012 05:00:00 +0000

Stunning New Video: From the Earth to the Moon, by NLSI

Encore: Planetesimal-Driven Migration, by Dr. David Minton and Nancy Atkinson

Wed, 05 Sep 2012 03:25:45 +0000

Encore: Planetesimal-Driven Migration, by Dr. David Minton and Nancy Atkinson

Old balding astronomers feel good knowing mnemonics, by Steve Nerlich

Tue, 04 Sep 2012 05:55:17 +0000

Old balding astronomers feel good knowing mnemonics, by Steve Nerlich

Support Your Local Astronomical Society, by Marie O'Sullivan

Mon, 03 Sep 2012 05:00:00 +0000

Support Your Local Astronomical Society, by Marie O'Sullivan

Encore: The Sky Through Two Telescopes, by George Kristiansen

Sun, 02 Sep 2012 05:00:00 +0000

Encore: The Sky Through Two Telescopes, by George Kristiansen

Encore: A Closer Look at Galaxy Clusters, by Thomas Hofstätter

Sat, 01 Sep 2012 05:00:00 +0000

Encore: A Closer Look at Galaxy Clusters, by Thomas Hofstätter

Monthly News Roundup, by Morgan Rehnberg

Fri, 31 Aug 2012 17:40:37 +0000

Monthly News Roundup, by Morgan Rehnberg

LAMP Confirms Apollo Finding of Helium in the Lunar Atmosphere, by the NASA Lunar Science Institute

Fri, 31 Aug 2012 17:38:34 +0000

LAMP Confirms Apollo Finding of Helium in the Lunar Atmosphere, by the NASA Lunar Science Institute

What in Tarnation is Kuiper Belt Object, by Hoss von Liederhosen

Thu, 30 Aug 2012 01:13:38 +0000

What in Tarnation is Kuiper Belt Object, by Hoss von Liederhosen

Astronomy Word of the Week : Black Holes, by Christopher Crockett

Tue, 28 Aug 2012 05:05:00 +0000

Astronomy Word of the Week : Black Holes, by Christopher Crockett

The Light Fantastic, by Renee Hlozek

Mon, 27 Aug 2012 05:32:36 +0000

The Light Fantastic, by Renee Hlozek

Encore: Space: What Is It? by Alvin Ashworth

Sat, 25 Aug 2012 05:00:00 +0000

Encore: Space: What Is It? by Alvin Ashworth

100 Year Starship Initiative Summary, by Wes Winberry

Fri, 24 Aug 2012 05:00:00 +0000

100 Year Starship Initiative Summary, by Wes Winberry

Uwingu—A New Way to Support Space Exploration, by Mat Kaplan / The Planetary Society

Thu, 23 Aug 2012 05:35:32 +0000

Uwingu—A New Way to Support Space Exploration, by Mat Kaplan / The Planetary Society

Sentinel Mission, by Ball Aerospace

Wed, 22 Aug 2012 05:00:00 +0000

Sentinel Mission, by Ball Aerospace

The North Star, by Christopher Crockett

Tue, 21 Aug 2012 05:00:00 +0000

The North Star, by Christopher Crockett

ENCORE: An Inside Look at the NASA Lunar Science Institute, by The NASA Lunar Science Institute

Mon, 20 Aug 2012 05:00:00 +0000

ENCORE: An Inside Look at the NASA Lunar Science Institute, by The NASA Lunar Science Institute

Encore: A Brief Introduction to Galaxy Dynamics, by Edgardo Molina

Sun, 19 Aug 2012 06:21:31 +0000

Encore: A Brief Introduction to Galaxy Dynamics, by Edgardo Molina

Encore : Belinda Nicholson – The Stars Are Her Laboratory, by Kylie Sturgess

Sat, 18 Aug 2012 18:58:59 +0000

Encore : Belinda Nicholson – The Stars Are Her Laboratory, by Kylie Sturgess

Probing the Almost Nothingness, by Bob Hirshon, AAAS

Fri, 17 Aug 2012 13:09:27 +0000

Probing the Almost Nothingness, by Bob Hirshon, AAAS

Why Gale Crater? by Alan Kerlin

Thu, 16 Aug 2012 06:14:23 +0000

Why Gale Crater? by Alan Kerlin

Space Elevator, by Steve Nerlich

Wed, 15 Aug 2012 05:28:50 +0000

Space Elevator, by Steve Nerlich

The Kitt Peak Research Experience for Undergraduates, by Rob Sparks/NOAO

Tue, 14 Aug 2012 05:00:00 +0000

The Kitt Peak Research Experience for Undergraduates, by Rob Sparks/NOAO

On the Screen: Science Fact vs. Science Fiction, by Jane Platt and Kevin Grazier

Mon, 13 Aug 2012 05:00:00 +0000

On the Screen: Science Fact vs. Science Fiction, by Jane Platt and Kevin Grazier

Encore: How to View a Meteor Shower, by Frasier Cain and Dr. Pamela Gay

Sun, 12 Aug 2012 05:00:00 +0000

Encore: How to View a Meteor Shower, by Frasier Cain and Dr. Pamela Gay

Encore: Mars Exploration: A Quick History, by Susan and Amanda Murph

Sat, 11 Aug 2012 05:00:00 +0000

Encore: Mars Exploration: A Quick History, by Susan and Amanda Murph

The Square Kilometre Array decision - Part 2, by Alan Kerlin

Fri, 10 Aug 2012 05:19:17 +0000

The Square Kilometre Array decision - Part 2, by Alan Kerlin

The Square Kilometre Array decision - Part 1, by Alan Kerlin

Thu, 09 Aug 2012 05:00:00 +0000

The Square Kilometre Array decision - Part 1, by Alan Kerlin

Telescopes, by TelescopeMan

Wed, 08 Aug 2012 05:00:00 +0000

Telescopes, by TelescopeMan

Astronomy Word of the Week : Apogalacticon, by Christopher Crockett

Tue, 07 Aug 2012 05:00:00 +0000

Astronomy Word of the Week : Apogalacticon, by Christopher Crockett

Encore: New Looks at the Apollo Landing Sites, by the NASA Lunar Science Institute

Mon, 06 Aug 2012 05:00:00 +0000

Encore: New Looks at the Apollo Landing Sites, by the NASA Lunar Science Institute

Encore: Bill Nye Says Curiosity Knows No Bounds—The Mars Science Laboratory Lands on the Red Planet, by Bill Nye the Science Guy and Mat Kaplan

Sun, 05 Aug 2012 05:00:00 +0000

Encore: Bill Nye Says Curiosity Knows No Bounds—The Mars Science Laboratory Lands on the Red Planet, by Bill Nye the Science Guy and Mat Kaplan

Encore: A ChemCam Conversation, by Andy Shaner & Friends

Sat, 04 Aug 2012 22:05:28 +0000

Encore: A ChemCam Conversation, by Andy Shaner & Friends

Observing With Webb in July 2012, by Rob Webb

Sat, 04 Aug 2012 00:58:24 +0000

Observing With Webb in July 2012, by Rob Webb

Mars Science Lab, by Steve Nerlich

Thu, 02 Aug 2012 13:34:01 +0000

Mars Science Lab, by Steve Nerlich

Dare To Do Difficult Things, by Manoharan Karthigasu

Wed, 01 Aug 2012 05:00:00 +0000

Dare To Do Difficult Things, by Manoharan Karthigasu

Astronomy Word of the Week : Zodiac, by Christopher Crockett

Tue, 31 Jul 2012 05:03:59 +0000

Astronomy Word of the Week : Zodiac, by Christopher Crockett

7 Minutes of Terror: Entry Descent and Landing of the Mars Curiosity Rovers, by Tony Rice

Mon, 30 Jul 2012 05:35:44 +0000

7 Minutes of Terror: Entry Descent and Landing of the Mars Curiosity Rovers, by Tony Rice

Encore : Creativity and Astronomy, by Tatiana Ouvarova

Sun, 29 Jul 2012 07:40:45 +0000

Encore : Creativity and Astronomy, by Tatiana Ouvarova

Encore: What is the Kuiper Belt? by Susan, Amanda and Kevin Murph

Sat, 28 Jul 2012 08:07:48 +0000

Encore: What is the Kuiper Belt? by Susan, Amanda and Kevin Murph

Bill Nye Says Curiosity Knows No Bounds—The Mars Science Laboratory Lands on the Red Planet, by Mat Kaplan / The Planetary Society

Fri, 27 Jul 2012 14:39:25 +0000

Bill Nye Says Curiosity Knows No Bounds—The Mars Science Laboratory Lands on the Red Planet, by Mat Kaplan / The Planetary Society

Monthly News Roundup: Pluto's New Friend, by Morgan Rehnberg

Fri, 27 Jul 2012 14:37:25 +0000

Monthly News Roundup: Pluto's New Friend, by Morgan Rehnberg

All the way up to Iron, by Julia

Wed, 25 Jul 2012 05:00:00 +0000

All the way up to Iron, by Julia

Astronomy Word of the Week : Yarkovsky, by Christopher Crockett

Tue, 24 Jul 2012 05:42:51 +0000

Astronomy Word of the Week : Yarkovsky, by Christopher Crockett

The View from LROC, by NLSI

Mon, 23 Jul 2012 05:59:24 +0000

The View from LROC, by NLSI

Encore : Downsizing the Universe! by Patrick McQuillan

Sun, 22 Jul 2012 05:00:00 +0000

Encore : Downsizing the Universe! by Patrick McQuillan

Encore: A Sneak-Peak on Variable Stars, by Julio Vannini

Sat, 21 Jul 2012 17:48:33 +0000

Encore: A Sneak-Peak on Variable Stars, by Julio Vannini

A Soggier Mars, by Bob Hirschon, AAAS

Fri, 20 Jul 2012 08:45:40 +0000

A Soggier Mars, by Bob Hirschon, AAAS

Astronomy Clubs, by TelescopeMan

Fri, 20 Jul 2012 01:48:02 +0000

Astronomy Clubs, by TelescopeMan

Cheap Astronomy—Live in Hawaii! by Steve Nerlich

Wed, 18 Jul 2012 05:00:00 +0000

Cheap Astronomy—Live in Hawaii! by Steve Nerlich

Astronomy Word of the Week : X-Ray, by Christopher Crockett

Tue, 17 Jul 2012 05:00:00 +0000

Astronomy Word of the Week : X-Ray, by Christopher Crockett

A Unique Experiment for LRO's Mini-RF, by the NASA Lunar Science Institute

Mon, 16 Jul 2012 05:32:55 +0000

A Unique Experiment for LRO's Mini-RF, by the NASA Lunar Science Institute

Encore: Black Hole Street Smarts, by Lia Corrales and David Tam

Sun, 15 Jul 2012 09:44:48 +0000

Encore: Black Hole Street Smarts, by Lia Corrales and David Tam

The Most Massive Neutron Star, by Rob Knop

Sat, 14 Jul 2012 05:00:00 +0000

The Most Massive Neutron Star, by Rob Knop

A Flat and Expanding Universe, Pt. 2, by Steve Nerlich

Fri, 13 Jul 2012 05:51:14 +0000

A Flat and Expanding Universe, Pt. 2, by Steve Nerlich

A flat and expanding universe, Pt. 1, by Steve Nerlich

Thu, 12 Jul 2012 05:40:47 +0000

A flat and expanding universe, Pt. 1, by Steve Nerlich

Astronomy Word of the Week : White Dwarf, by Christopher Crockett

Wed, 11 Jul 2012 05:00:00 +0000

Astronomy Word of the Week : White Dwarf, by Christopher Crockett

The Advance Technology Solar Telescope, by Rob Sparks/NOAO

Tue, 10 Jul 2012 05:25:50 +0000

The Advance Technology Solar Telescope, by Rob Sparks/NOAO

An Introduction to Active Galactic Nuclei, by Olaf Davis & Renee Hlozek

Mon, 09 Jul 2012 05:35:52 +0000

An Introduction to Active Galactic Nuclei, by Olaf Davis & Renee Hlozek

Encore: Discussing the Issues of Knowledge Through Astronomy, by Manoharan Karthigasu

Sun, 08 Jul 2012 05:00:00 +0000

Encore: Discussing the Issues of Knowledge Through Astronomy, by Manoharan Karthigasu

Encore : Symmetries in the Universe, by Renee Hlozek and David Marsh

Sat, 07 Jul 2012 05:00:00 +0000

Encore : Symmetries in the Universe, by Renee Hlozek and David Marsh

Observing With Webb in July 2012, by Rob Webb

Fri, 06 Jul 2012 06:14:09 +0000

Observing With Webb in July 2012, by Rob Webb

A Unique Hunt for Meteorites for NLSI, by the NASA Lunar Science Institute

Thu, 05 Jul 2012 05:00:00 +0000

A Unique Hunt for Meteorites for NLSI, by the NASA Lunar Science Institute

Encore: The Moon – Our Sidekick, by Rob Berthiaume

Wed, 04 Jul 2012 06:00:42 +0000

Encore: The Moon – Our Sidekick, by Rob Berthiaume

Astronomy Word of the Week : VLBI, by Christopher Crockett

Tue, 03 Jul 2012 13:23:20 +0000

Astronomy Word of the Week : VLBI, by Christopher Crockett

Tides, Moons and Other Bodies, by Nik Whitehead

Mon, 02 Jul 2012 05:00:00 +0000

Tides, Moons and Other Bodies, by Nik Whitehead

Encore : Don't Forget Kepler, by David Powell

Sun, 01 Jul 2012 05:00:00 +0000

Encore : Don't Forget Kepler, by David Powell

Encore : The Big Bang! by Josh Schroeder from Columbia Astronomy

Sat, 30 Jun 2012 05:00:00 +0000

Encore : The Big Bang! by Josh Schroeder from Columbia Astronomy

The Transit of Venus, by Jay Pasachoff

Fri, 29 Jun 2012 05:00:00 +0000

The Transit of Venus, by Jay Pasachoff

Curiosity Rover: Seven Minutes of Terror, by Mat Kaplan / The Planetary Society

Thu, 28 Jun 2012 05:00:00 +0000

Curiosity Rover: Seven Minutes of Terror, by Mat Kaplan / The Planetary Society

Summer Night Sky Viewing Highlights, by Katie Peterson / Adler Planetarium

Wed, 27 Jun 2012 13:20:04 +0000

Summer Night Sky Viewing Highlights, by Katie Peterson / Adler Planetarium

Star Charts, Your Guiding to the Night Sky, by Telescope Man

Tue, 26 Jun 2012 05:34:22 +0000

Star Charts, Your Guiding to the Night Sky, by Telescope Man

Astronomy Word of the Week : ULIRG, by Christopher Crockett

Mon, 25 Jun 2012 05:00:00 +0000

Astronomy Word of the Week : ULIRG, by Christopher Crockett

Encore :It’s a Smash Up – Interacting Galaxies, by Brian Gay

Sun, 24 Jun 2012 06:50:30 +0000

Encore :It’s a Smash Up – Interacting Galaxies, by Brian Gay

Encore : Near Earth Objects — Not if, but When? Roz Brown, Ball Aerospace

Sat, 23 Jun 2012 05:00:00 +0000

Encore : Near Earth Objects — Not if, but When? Roz Brown, Ball Aerospace

Encore: A Tour of the Crab Nebula, by Chandra X-Ray

Fri, 22 Jun 2012 05:31:05 +0000

Encore: A Tour of the Crab Nebula, by Chandra X-Ray

Astronomy Word of the Week : Trojan, by Christopher Crockett

Thu, 21 Jun 2012 05:00:00 +0000

Astronomy Word of the Week : Trojan, by Christopher Crockett

Craters on the Moon Vs. Mars, by the NASA Lunar Science Institute

Wed, 20 Jun 2012 22:14:44 +0000

Craters on the Moon Vs. Mars, by the NASA Lunar Science Institute

Dear Cheap Astronomy (Questions from listeners), by Steve Nerlich

Tue, 19 Jun 2012 05:00:00 +0000

Dear Cheap Astronomy (Questions from listeners), by Steve Nerlich

Binoviews, by TelescopeMan

Mon, 18 Jun 2012 05:00:00 +0000

Binoviews, by TelescopeMan

Encore : Measuring Time, by Nik Whitehead

Sun, 17 Jun 2012 14:55:20 +0000

Encore : Measuring Time, by Nik Whitehead

Encore : Solar System Nomenclature, by Brian Gray

Sat, 16 Jun 2012 05:00:00 +0000

Encore : Solar System Nomenclature, by Brian Gray

Viewing Mercury with X-Ray Vision, by Bob Hirshon, AAAS

Fri, 15 Jun 2012 05:00:00 +0000

Viewing Mercury with X-Ray Vision, by Bob Hirshon, AAAS

Encore :The Changing Universe, by Jesse Rogerson

Thu, 14 Jun 2012 05:00:00 +0000

Encore :The Changing Universe, by Jesse Rogerson

Astronomy Word of the Week : Siderial, by Christopher Crockett

Wed, 13 Jun 2012 05:59:20 +0000

Astronomy Word of the Week : Siderial, by Christopher Crockett

Kitt Peak Artists in Residence, by Rob Sparks/NOAO

Tue, 12 Jun 2012 05:00:00 +0000

Kitt Peak Artists in Residence, by Rob Sparks/NOAO

Encore: Radio Astronomy: An Important Tool, by Nitza Santiago

Mon, 11 Jun 2012 05:00:00 +0000

Encore: Radio Astronomy: An Important Tool, by Nitza Santiago

Encore: It’s All About the Reference Frames, by Kenneth Johnston

Sun, 10 Jun 2012 05:00:00 +0000

Encore: It’s All About the Reference Frames, by Kenneth Johnston

Encore : Gravity Wave Astronomy, by Ivan Semeniuk

Sat, 09 Jun 2012 17:59:11 +0000

Encore : Gravity Wave Astronomy, by Ivan Semeniuk

New Horizons, by Steve Nerlich

Fri, 08 Jun 2012 13:10:00 +0000

New Horizons, by Steve Nerlich

Galileo Was Right! by Ken Brandt

Thu, 07 Jun 2012 05:00:00 +0000

Galileo Was Right! by Ken Brandt

Astronomy Word of the Week : Redshift, by Christopher Crockett

Wed, 06 Jun 2012 05:00:00 +0000

Astronomy Word of the Week : Redshift, by Christopher Crockett

Apollo Rocks Give Up More of the Moon's Secrets, by the NASA Lunar Science Institute

Tue, 05 Jun 2012 05:00:00 +0000

Apollo Rocks Give Up More of the Moon's Secrets, by the NASA Lunar Science Institute

Transit of Venus, by Christopher Crockett

Mon, 04 Jun 2012 05:00:00 +0000

Transit of Venus, by Christopher Crockett

Encore: Transiting Extra Solar Planets, by Brains Matter

Sun, 03 Jun 2012 05:24:33 +0000

Encore: Transiting Extra Solar Planets, by Brains Matter

Encore: Exploring the Solar System: Venus, by Thomas Hofstätter

Sat, 02 Jun 2012 05:00:00 +0000

Encore: Exploring the Solar System: Venus, by Thomas Hofstätter

Observing With Webb in June 2012, by Rob Webb

Fri, 01 Jun 2012 04:59:51 +0000

Observing With Webb in June 2012, by Rob Webb

Planetary Radio Live at the National Air and Space Museum, by Mat Kaplan / The Planetary Society

Thu, 31 May 2012 05:00:00 +0000

Planetary Radio Live at the National Air and Space Museum, by Mat Kaplan / The Planetary Society

Countdown for Upcoming Solar Eclipses, by Jay Pasachoff

Wed, 30 May 2012 17:51:04 +0000

Countdown for Upcoming Solar Eclipses, by Jay Pasachoff

Astronomy Word of the Week : Quasar, by Christopher Crockett

Tue, 29 May 2012 05:53:26 +0000

Astronomy Word of the Week : Quasar, by Christopher Crockett

The Transit of Venus, by Steve Nerlich

Mon, 28 May 2012 07:43:58 +0000

The Transit of Venus, by Steve Nerlich

Encore : A Guide to the Stars and Planets, by Carolyn Collins Petersen

Sun, 27 May 2012 05:00:00 +0000

Encore : A Guide to the Stars and Planets, by Carolyn Collins Petersen

Encore: Eclipsing Binaries, by AAVSO

Sat, 26 May 2012 05:00:00 +0000

Encore: Eclipsing Binaries, by AAVSO

Encore: Detecting Moons Around Extrasolar Planets, by Adam Fuller

Fri, 25 May 2012 06:41:20 +0000

Encore: Detecting Moons Around Extrasolar Planets, by Adam Fuller

Comics in SPAAAAACE! by Paul Caggegi

Thu, 24 May 2012 05:00:00 +0000

Comics in SPAAAAACE! by Paul Caggegi

Northeast Astronomy Forum, by RapidEye

Wed, 23 May 2012 05:44:45 +0000

Northeast Astronomy Forum, by RapidEye

Astronomy Word of the Week : Parallax, by Christopher Crockett

Tue, 22 May 2012 05:00:00 +0000

Astronomy Word of the Week : Parallax, by Christopher Crockett

Encore: LCROSS and the Land of the Lunar Shadows, by the NASA Lunar Science Institute

Mon, 21 May 2012 05:33:51 +0000

Encore: LCROSS and the Land of the Lunar Shadows, by the NASA Lunar Science Institute

Encore: The Universe in Ultraviolet! by Erika Hamden

Sun, 20 May 2012 05:00:00 +0000

Encore: The Universe in Ultraviolet! by Erika Hamden

Encore: Helium and the Sun, by Susan & Amanda Murph

Sat, 19 May 2012 08:14:41 +0000

Encore: Helium and the Sun, by Susan & Amanda Murph

Galaxies, by Mel Blake

Fri, 18 May 2012 13:30:27 +0000

Galaxies, by Mel Blake

Encore: The Sound of Strings: An Idea of Design, by Micol Christopher & Matthew Graham

Thu, 17 May 2012 06:31:53 +0000

Encore: The Sound of Strings: An Idea of Design, by Micol Christopher & Matthew Graham

GPS, by Steve Nerlich

Wed, 16 May 2012 13:12:48 +0000

GPS, by Steve Nerlich

Astronomy Word of the Week : Obliquity, by Christopher Crockett

Tue, 15 May 2012 08:13:57 +0000

Astronomy Word of the Week : Obliquity, by Christopher Crockett

Diamond Planet Finder Is A Star, by Michael Greenwell

Mon, 14 May 2012 05:17:16 +0000

Diamond Planet Finder Is A Star, by Michael Greenwell

Encore: Exploring Space from Space, by Kenneth Renshaw

Sun, 13 May 2012 07:43:57 +0000

Encore: Exploring Space from Space, by Kenneth Renshaw

Encore: Our Place in Space, by Pamela Gay

Sat, 12 May 2012 09:19:43 +0000

Encore: Our Place in Space, by Pamela Gay

Take Mercury for a Spin, by Bob Hirshon, AAAS

Fri, 11 May 2012 05:57:21 +0000

Take Mercury for a Spin, by Bob Hirshon, AAAS

Twinkle Twinkle little star ...... How I wonder FS Aur? by Peter Lake

Thu, 10 May 2012 07:54:27 +0000

Twinkle Twinkle little star ...... How I wonder FS Aur? by Peter Lake

Astronomy Word of the Week : Inflation, by Christopher Crockett

Wed, 09 May 2012 05:00:00 +0000

Astronomy Word of the Week : Inflation, by Christopher Crockett

Interview with Dr. Stephen Pompea, by Rob Sparks/NOAO

Tue, 08 May 2012 05:00:00 +0000

Interview with Dr. Stephen Pompea, by Rob Sparks/NOAO

The Late Heavy Bombardment -- an Extended Version? by the NASA Lunar Science Institute

Mon, 07 May 2012 06:02:06 +0000

The Late Heavy Bombardment -- an Extended Version? by the NASA Lunar Science Institute

Encore: Are There Alternative Universes? by Stuart Clark

Sun, 06 May 2012 08:30:54 +0000

Encore: Are There Alternative Universes? by Stuart Clark

Encore :Were the Fundamental Constants of Physics Different in the Early Universe? by Rob Knop

Sat, 05 May 2012 19:05:53 +0000

Encore :Were the Fundamental Constants of Physics Different in the Early Universe? by Rob Knop

Observing With Webb in May 2012, by Rob Webb

Fri, 04 May 2012 08:57:20 +0000

Observing With Webb in May 2012, by Rob Webb

Astronomy Word of the Week : Meridian, by Christopher Crockett

Thu, 03 May 2012 05:00:00 +0000

Astronomy Word of the Week : Meridian, by Christopher Crockett

OSIRIS-REx Target Asteroids Campaign, by Peter Lake

Thu, 03 May 2012 04:13:07 +0000

OSIRIS-REx Target Asteroids Campaign, by Peter Lake

Encore : It’s All About the Reference Frames, by Kenneth Johnston

Tue, 01 May 2012 05:51:38 +0000

Encore : It’s All About the Reference Frames, by Kenneth Johnston

Stars, by Jeffrey Tang / Astronomy For Kids Podcast

Mon, 30 Apr 2012 06:19:02 +0000

Stars, by Jeffrey Tang / Astronomy For Kids Podcast

Encore: Astronomical Lessons for Life, by Mark Jones

Sun, 29 Apr 2012 06:05:51 +0000

Encore: Astronomical Lessons for Life, by Mark Jones

Encore : Our Nearest Variable Star, by Mike Simonsen

Sat, 28 Apr 2012 07:35:49 +0000

Encore : Our Nearest Variable Star, by Mike Simonsen

why we should care about space weather, by Neil Middle School Astronomy Class

Fri, 27 Apr 2012 05:00:00 +0000

why we should care about space weather, by Neil Middle School Astronomy Class

Larry Bock: 2nd USA Science and Engineering Festival on April 28 & 29, by Mat Kaplan / The Planetary Society

Fri, 27 Apr 2012 04:19:05 +0000

Larry Bock: 2nd USA Science and Engineering Festival on April 28 & 29, by Mat Kaplan / The Planetary Society

Encore : You Can Do Astronomy, by Carolyn Collins Petersen

Wed, 25 Apr 2012 05:21:00 +0000

Encore : You Can Do Astronomy, by Carolyn Collins Petersen

Astronomy Word of the Week : Light-Year, by Christopher Crockett

Tue, 24 Apr 2012 05:10:10 +0000

Astronomy Word of the Week : Light-Year, by Christopher Crockett

The Age of the Universe, by Steve Nerlich

Mon, 23 Apr 2012 05:47:21 +0000

The Age of the Universe, by Steve Nerlich

Encore: The Folklore Surrounding the Aurora, by Craig Robertson

Sun, 22 Apr 2012 07:13:25 +0000

Encore: The Folklore Surrounding the Aurora, by Craig Robertson

Encore: The Supernova That Bounces, by Rob Bowman

Sat, 21 Apr 2012 07:18:48 +0000

Encore: The Supernova That Bounces, by Rob Bowman

Mysterious Lunar Swirls, by the NASA Lunar Science Institute

Fri, 20 Apr 2012 05:12:43 +0000

Mysterious Lunar Swirls, by the NASA Lunar Science Institute

Encore : Earth Clones, by Chris Impey

Thu, 19 Apr 2012 05:00:00 +0000

Encore : Earth Clones, by Chris Impey

Encore : The Equation of Time, by John Dalziel

Thu, 19 Apr 2012 04:55:05 +0000

Encore : The Equation of Time, by John Dalziel

Binary Stars, by Mel Blake

Thu, 19 Apr 2012 04:32:12 +0000

Binary Stars, by Mel Blake

Astronomy Word of the Week : Kuiper, by Christopher Crockett

Tue, 17 Apr 2012 05:00:00 +0000

Astronomy Word of the Week : Kuiper, by Christopher Crockett

Encore: Introduction to Practical Astronomy, by Justin Clayden

Mon, 16 Apr 2012 05:38:12 +0000

Encore: Introduction to Practical Astronomy, by Justin Clayden

Encore: The Secrets of Star Birth, by Daniel Pendick

Sun, 15 Apr 2012 05:00:00 +0000

Encore: The Secrets of Star Birth, by Daniel Pendick

Encore: Herschel and Planck Set Sail into the Cold Universe, by Edward and Haley Gomez

Sat, 14 Apr 2012 05:04:02 +0000

Encore: Herschel and Planck Set Sail into the Cold Universe, by Edward and Haley Gomez

Harpooning A Comet, by Bob Hirshon, AAAS

Sat, 14 Apr 2012 04:59:21 +0000

Harpooning A Comet, by Bob Hirshon, AAAS

International Dark Sky Week, by W. Scott Kardel

Thu, 12 Apr 2012 05:00:00 +0000

International Dark Sky Week, by W. Scott Kardel

Astronomy Word of the Week : Jansky, by Christopher Crockett

Wed, 11 Apr 2012 06:56:03 +0000

Astronomy Word of the Week : Jansky, by Christopher Crockett

Astro Tourism on Kitt Peak, by Rob Sparks/NOAO

Tue, 10 Apr 2012 05:00:00 +0000

Astro Tourism on Kitt Peak, by Rob Sparks/NOAO

Dark Skies in Harmony, by Lauren Harder

Mon, 09 Apr 2012 05:00:00 +0000

Dark Skies in Harmony, by Lauren Harder

Encore: The Journey of Astronomy, by Megan Argo

Mon, 09 Apr 2012 04:31:47 +0000

Encore: The Journey of Astronomy, by Megan Argo

Encore: The Eastern Sky, by Natalie Hildebrandt & Grace Thornton

Sat, 07 Apr 2012 05:00:00 +0000

Encore: The Eastern Sky, by Natalie Hildebrandt & Grace Thornton