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> Supernova remnant Cassiopeia A in X-ray

Supernova remnant Cassiopeia A in X-ray

author: Nasa/CXC/SAO/Novapix

reference: a-snv11-00200

Image Size 300 DPI: 18 * 18 cm

Cas A is the remnant of a star that exploded about 300 years ago. The X-ray image shows an expanding shell of hot gas produced by the explosion. This gaseous shell is about 10 light years in diameter, and has a temperature of about 50 million degrees.

Keywords for this photo:

1999 - ASTRONOMY - CASSIOPEIA - CASSIOPEIA A - CHANDRA - EVOLUTION - STAR - SUPERNOVA - SUPERNOVA REMNANT - X - X-RAY -