Look! A lopsided supernova may be hiding a mysterious void - Inverse

Cassiopeia A isn't behaving quite like it should. It could be a strange void in the midst of the system.

An unseen obstacle in the cloud of gas around a supernova remnant 11,000 light years away is making the supernovas blast waves lopsided, according to two recent studies. Two teams of astrophysicis… [+9083 chars]

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