Supernova Remnant
The structure resulting from the explosion of a star in a supernova. It consists of ejected material expanding from the explosion and the shocked interstellar medium it sweeps up.
Source: apod.nasa.gov
APODs including "Supernova Remnant"
The Mysterious Rings of Supernova 1987a
05/07/1996
What's causing those odd rings in supernova 1987a? In 1987, the brightest supernova in recent history occurred in the Large Magellanic Clouds. At the center of the picture is an object central to the remains of the violent stellar explosion. When the Hubble Space Telescope was pointed at the supernova remnant in 1994, however, curious rings were discovered. The origins of these rings still remains a mystery. Speculation into the cause of the rings includes beamed jets emanating from a dense star left over from the supernova, and a superposition of two stellar winds ionized by the supernova explosion.