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Supernova Remnant Cassiopeia A
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ABOUT THIS IMAGE
This youngest-known supernova remnant in our galaxy lies 10,000 light years away in the constellation Cassiopeia. The light from this exploding star first reached Earth in the 1600s.
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Image Credit: NASA and The Hubble Heritage Team (STScI/AURA)
Acknowledgment: R. Fesen (Dartmouth) and J. Morse (Univ. of Colorado)