Super Portrait: X-ray telescope eyes supernova remnant | Science News

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Super Portrait: X-ray telescope eyes supernova remnant

11:02am, August 25, 2004

When light from a massive star that exploded in the constellation Cassiopeia reached Earth some 340 years ago, few if any sky watchers recorded the event. But over the past several decades, the glowing remains of that explosion—a vast bubble of hot gas and dust called Cassiopeia A—has become one of the most studied supernova remnants in the heavens.

Trained on Cassiopeia A for viewing sessions totaling 11.5 days, NASA's Chandra X-ray Observatory has now taken the most detailed portrait ever recorded of any supernova remnant. The image provides new evidence linking supernova explosions to

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