Supernova Remnant Cassiopeia A is Lopsided - Universe Today
4/11/2022 12:00:00 AM3 yearsago
by https://www.facebook.com/evan.gough.3
by https://www.facebook.com/evan.gough.3
Supernova remnant Cassiopeia A isn't expanding evenly. Its reverse shock wave has bounced off of something and is travelling inward.
Cassiopeia A is the remnant of a supernova that exploded 11,000 light-years away. The light from the exploding star likely reached Earth around 1670 (only a couple of years before Newton invented the… [+6026 chars]
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