Remains of one the Milky Way's most famous explosions are not expanding evenly - Daily Mail

The inner nebula of the much-studied supernova may have collided with another phenomenon, according to a team from the University of Amsterdam and Harvard.

The remains of Cassiopeia A, one of the most famous supernova explosions in the Milky Way, is not expanding evenly in all directions, according to a new study.  The inner nebula of the much-studied … [+5082 chars]

full article...