The Case of Missing Iron in Cassiopeia A

Photographer: guiiu
Location: NASA JPL / Deep Space
License: <a href="https://creativecommons.org/publicdomain/zero/1.0/" target="_blank" rel="noopener noreferrer" style="color: #f5c3b8; text-decoration: underline;">CC0 License
Credit / Source: <a href="https://images.nasa.gov/details/PIA17842" target="_blank" rel="noopener noreferrer" style="color: #f5c3b8; text-decoration: underline;">View Source

When astronomers first looked at images of a supernova remnant called Cassiopeia A, captured by NASA NuSTAR. The mystery of Cassiopeia A Cas A, a massiv...

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The Case of Missing Iron in Cassiopeia A

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