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Nasa's Nustar ­ntangles Mystery of How Stars Explode

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Supernova remnant

Untangling the Remains of Cassiopeia A. This is the first map of radioactivity in a supernova remnant, the blown-out bits and pieces of a massive star that exploded. The blue color shows radioactive material mapped in high-energy X-rays using NuSTAR.

Credit: NASA/JPL-Caltech/CXC/SAO

One of the biggest mysteries in astronomy, how stars blow up in supernova explosions, finally is being unraveled with the help of NASA's Nuclear Spectroscopic Telescope Array (NuSTAR).

From Jet Propulsion Laboratory/NASA
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