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| Spy Satellite |
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| U.S. Brings Down Errant Spy Satellite |
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February 20, 2008
Analysis
Experts discuss the U.S. military's effort to shoot down a defunct spy satellite and how it might fit into the Pentagon's larger space strategy.
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| Supernova Sighting |
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| Experts Study Final Moments of Dying Star |
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May 21, 2008
Analysis
The deaths of some stars are marked by a unique event: the supernova. A NASA telescope captured a massive explosion in January, giving scientists clues into the mechanics of our own world. Robert Kirshner of Harvard University explains the significance of the event.
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| RELATED INFORMATION | | Slide Show: Images of the Supernova
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| Images from Mars |
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| Sputnik 50 Years |
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