Email
Password
Remember meForgot password?
    Log in with Twitter

2015-02-03 06:10:29

File illustration: Cassiopeia A (Cas A) is the remnant of a massive star that exploded about 300 years ago. The X-ray image shows an expanding shell of hot gas produced by the explosion.

Image uploaded by Robert Myles
Featured In
News Jun 3, 2019 - Space telescope captures 1800 exploding stars
Feb 3, 2015 - Clues to supernovae found — right here on Earth
Latest News
Top News