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Last updated on April 20, 2014 at 21:20 EDT
Supernova Remnant Cas-A
19 of 32

Supernova Remnant Cas-A

March 17, 2003
This is a PSPC image of the Supernova Remnant (SNR) Cas-A. The supernova that left this remnant exploded in 1680 A.D.