Cassiopeia A is the remnant of a supernova explosion that occured over 300 years ago in our Galaxy, at a distance of about 11,000 light years from us. A supernova is the explosion that occurs at the end of a massive star's life; and Cassiopeia A is the expanding shell of material that remains from such an explosion. The material that was ejected from the supernova explosion can be seen in this image as bright filaments.
|Astronomer:||L. Rudnick, T. Delaney, J. Keohane & B. Koralesky (U. Minnesota) and T.A. Rector (NRAO)|
|Date of Observation:||03-25-1994|
|Location of Image:||Cassiopeia|
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