This is DEM L316. It might seem like one object, but these are the remnants of two different supernovas (of different types: smaller is Type Ia, bigger Type II)

This is DEM L316. It might seem like one object, but these are the remnants of two different supernovas (of different types: smaller is Type Ia, bigger Type II). [0] http://chandra.harvard.edu/photo/2005/d316/ http://chandra.harvard.edu/photo/2005/d316/