This visible-light image from the Sloan Digital Sky Survey shows spiral galaxy NGC 7331, center, where astronomers observed the unusual supernova SN 2014C .
<p>The inset images are from NASA's Chandra X-ray Observatory, showing a small region of the galaxy before the supernova explosion (left) and after it (right). Red, green and blue colors are used for low, medium and high-energy X-rays, respectively.
</p><p>A version of this image without annotations is also available above. See <a href="//commons.wikimedia.org/wiki/File:PIA21089_-_Supernova_SN_2014C_(X-ray).jpg" title="File:PIA21089 - Supernova SN 2014C (X-ray).jpg">PIA21089</a> for a related image.
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For more Chandra images, multimedia and related materials, visit:<a rel="nofollow" class="external free" href="http://www.nasa.gov/chandra">http://www.nasa.gov/chandra</a>.
X-ray images: NASA/CXC/CIERA/R.Margutti et al; Optical image: SDSS
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