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Science and Space
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Star Explosion

This composite image from three space telescopes shows a debris cloud called Cassiopeia A. The 15-light-year-wide cloud was formed when a star exploded 325 years ago, leaving a trail of gas (blue, green, and yellow) surrounded by a shell of interstellar space dust (red).

Photograph courtesy NASA/JPL/Caltech/Oliver Krause, University of Arizona