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What is Podcasting?
Subscribe and automatically download fresh audio/video content: View content online by clicking the "View Podcast" links below (requires QuickTime 7.0 or other H.264-compliant video viewer. If videos do not play, right click or control click on the link to download the file to your hard drive & then open). Or, subscribe to the podcast using a program such as iTunes or ipodder with the podcast RSS/XML web address (listed below).
More Podcasts: [ High Def ] [ Standard Definition ] [ Touch the Invisible Sky ]
Video Podcast Listing (Archive)
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Exploring The Large Magellanic Cloud
(04-02-2008)
The Large Magellanic Cloud, known as the LMC, is a nearby satellite galaxy of our own Milky Way. At a distance of around 160,000 light-years, the LMC is the third closest galaxy to us. But the LMC is more than just a nice little sidekick.
- View Video Podcast (42.2 MB, Runtime: 6:32)
- Listen to Audio Only
- Transcript
- Related Links:
-- SNR 0509-67.5:
-- The Milky Way
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The Crab Nebula in 60 Seconds
(03-31-2008)
In 1054 A.D., a star's death in the constellation Taurus was observed on Earth. Now, almost a thousand years later, a superdense neutron star left behind by the explosion is spewing out a blizzard of extremely high-energy particles into the expanding debris field known as the Crab Nebula.
- View Video Podcast (6.6 MB, Runtime: 1:08)
- Listen to Audio Only
- Transcript
- Related Links:
-- Featured Image Tours
-- Crab Nebula
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The Universe Darkly
(02-29-2008)
When you look up at the night sky, you see a lot of things glowing like stars, planets, and galaxies. So it might sound strange to hear that most of the Universe is actually dark. The truth is the protons, neutrons and electrons that make up everything we can see, and that means everything with telescopes we've got, accounts for only about 4% of the mass and energy of the Universe. The rest is dark and mysterious. More specifically, about 70% of the Universe is what is known as dark energy; about 26% is so-called dark matter. Modern day astronomers have developed many tactics to explore the dark Universe, including using telescopes like Chandra.
- View Video Podcast (36.5 MB, Runtime: 5:23)
- Listen to Audio Only
- Transcript
- Related Links:
-- The Universe in a Jelly Bean Jar
-- The Universe
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Chandra in the (Google) Sky
(01-29-2008)
Astronomy is truly in a golden age. With a fleet of space-based observatories, including the Chandra X-ray Observatory, astronomers now have a suite of amazing tools to study the Universe. Simultaneously to this bonanza in astronomy has been the growth and expansion of the Internet. Think back to before 1990. The Internet was barely a rumor and there were no Great Observatories! But now people are taking advantage of these two seemingly separate advances to do some amazing things
- View Video Podcast (20.7 MB, Runtime: 4:27)
- Listen to Audio Only
- Transcript
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What's in a Name?
(01-02-2008)
Names in astronomy don't always tell the whole story. Let's take, for example, radio galaxies. Why, might you ask, would a Chandra podcast talk about such an object? The answer is that radio galaxies are, yes, very bright in radio emission. But they are also powerful emitters of X-rays, optical light and from other parts of the electromagnetic spectrum. More than that, they are important objects that really have played a very big role in how the Universe has evolved.
- View Video Podcast (34.3 MB, Runtime: 5:20)
- Listen to Audio Only
- Transcript
- Related Links:
-- 3C321
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The Truth and Lies about Black Holes
(11-30-2007)
Black holes have a bad reputation. After all, something that could swallow you completely sounds pretty scary. They're invisible, so maybe there's one just around the corner and we dont know it! Also, arent they enormous vacuum cleaners capable of destroying anything that gets near them? Once the black hole starts pulling on something, isnt that just a one-way ticket to oblivion? Well, not all of these things are exactly true.
- View Video Podcast (32.5 MB, Runtime: 5:00)
- Listen to Audio Only
- Transcript
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When Will History Repeat Itself?
(10-31-2007)
Astronomers think that a supernova should go off in our own Milky Way galaxy every 50 years or so. When was the last one we've seen? Probably 1604. Yes, that's over 400 years ago. This being astronomy however, things will undoubtedly average out over the long run, but in the meantime, we're left without a recent supernova in our Galaxy to study. Luckily for us, astronomers from previous centuries were on the case.
- View Video Podcast (36.2 MB, Runtime: 5:34)
- Listen to Audio Only
- Transcript
- Related Links:
-- Blasts From The Past: Historic Supernovas
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Please note: These podcasts include artist illustrations and conceptual animations in addition to astronomical data.
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