File:Cassiopeia A Supernova Remnant.jpg

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English: This image from NASA's Spitzer Space Telescope shows the scattered remains of an exploded star named Cassiopeia A. Spitzer's infrared detectors "picked" through these remains and found that much of the star's original layering had been preserved.

In this false-color image, the faint, blue glow surrounding the dead star is material that was energized by a shock wave, called the forward shock, which was created when the star blew up. The forward shock is now located at the outer edge of the blue glow. Stars are also seen in blue. Green, yellow and red primarily represent material that was ejected in the explosion and heated by a slower shock wave, called the reverse shock wave.

The picture was taken by Spitzer's infrared array camera and is a composite of 3.6-micron light (blue); 4.5-micron light (green); and 8.0-micron light (red).
Date
Source http://www.spitzer.caltech.edu/images/1675-ssc2006-19a-Lighting-up-a-Dead-Star-s-Layers
Author NASA/JPL-Caltech/L. Rudnick (University of Minnesota)

Image use policy: http://www.spitzer.caltech.edu/info/18-Image-Use-Policy

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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current23:04, 14 June 2011Thumbnail for version as of 23:04, 14 June 20112,400 × 3,000 (2.19 MB)Spitzersteph (talk | contribs)

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