Re: Cassiopeia A
This image is different than most Supernova remnants taken by Hubble in that most of the (glowing) gas associated with other explosions is absent. Only the main filaments remain. Surprising considering it's relatively young age.
Beautiful, Raoul. Thanks.
Marcia
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What do the colors show?
The colors represent various chemical elements that can be seen because they are glowing. For example, the dark blue fragments are richest in oxygen; the red material is rich in sulfur. The white, pink, and orange colors contain mixtures of oxygen and sulfur
From the HST site: http://hubblesite.org/news_.and._views/pr.cgi.2002+15