* Astronomy

NuSTAR Finds New Clues to 'Chameleon Supernova'

One supernova in particular is challenging astronomers' models of how exploding stars distribute their elements. The supernova SN 2014C dramatically changed in appearance over the course of a year, apparently because it had thrown off a lot of material late in its life. This doesn't fit into any recognized category of how a stellar explosion should happen. To explain it, scientists must reconsider established ideas about how massive stars live out their lives before exploding.
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SN 2014C was hosted by the spiral galaxy NGC 7331