<p>When a dying star exploded, it shot out a "bullet" of matter that's speeding away at about five million miles (eight million kilometers) an hour, as seen in a new picture of the supernova remnant N49.<br><br> The image, released Monday, combines visible-light data from the Hubble Space Telescope (yellow) and x-ray data from the <a id="r6dp" title="Chandra X-ray Observatory" href="http://chandra.harvard.edu/index.html">Chandra X-ray Observatory</a> (blue). Rich in silicon, sulfur, and neon, the bullet appears to be traveling away from a bright source of light near the top of the remnant, which astronomers say might be the <a id="i9bm" title="neutron star" href="http://science.nationalgeographic.com/science/space/solar-system/neutron-stars.html">neutron star</a> left over after the massive star collapsed and exploded.</p>

Supernova's Speeding Bullet

When a dying star exploded, it shot out a "bullet" of matter that's speeding away at about five million miles (eight million kilometers) an hour, as seen in a new picture of the supernova remnant N49.

The image, released Monday, combines visible-light data from the Hubble Space Telescope (yellow) and x-ray data from the Chandra X-ray Observatory (blue). Rich in silicon, sulfur, and neon, the bullet appears to be traveling away from a bright source of light near the top of the remnant, which astronomers say might be the neutron star left over after the massive star collapsed and exploded.

Image courtesy NASA/CXC/Penn State and STScI/UIUC

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