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Recent Podcast
A Tour of SDSS J103842.59+484917.7
A Tour of SDSS J103842.59+484917.7
One hundred years ago this month, Albert Einstein published his theory of general relativity, one of the most important scientific achievements in the last century. (2015-11-24)
Podcasts: 2007

Recent discoveries and updates of the Chandra mission in video and audio formats.

Snowball Fight in the Solar System (01-22-2007)
One of the most surprising objects observed in X-rays are comets. X-rays are normally associated with the hottest things in the Universe, such as black holes. Comets, however, were described by Fred Whipple as being "dirty snowballs". So how does a snowball make X-rays?

- Related Links:
--  Comet C/1999 S4 (LINEAR

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