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Cassiopeia A

Description
Cassiopeia A
(b) A corresponding X-ray picture of Cassiopeia A taken by Chandra. The opposing jets of silicon, probably guided by powerful
magnetic fields, were ejected early in the supernova, before the iron-rich jets were released. Radiation from the supernova that produced this
nebula first reached Earth 300 years ago. The explosion occurred about 10,000 ly from here.
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