The appearance of E0102 is best explained by a model in which the ejecta is shaped like a cylinder that is being viewed almost exactly end-on.[1] This model suggests that the explosion that created the E0102 remnant may itself have been strongly asymmetric, consistent with the rapid kicks given to neutron stars after supernova explosions. Another possibility is that the star exploded into a disk of material formed when material was shed from the equator of the pre-supernova red giant star. Such asymmetries have been observed in winds from lower mass red giants that form planetary nebulae.
The remnant consists of an outer blast wave produced by the supernova, and an inner ring of cooler material.[1] This inner ring is probably expanding ejecta from the explosion that is being heated by a shock wave travelling backwards into the ejecta. At its center is an isolated neutron star, the first such neutron star discovered outside the Milky Way.[2]
Related media on Commons![Featured in this Hubble image is an expanding, gaseous corpse — a supernova remnant — known as 1E 0102.2-7219.[3]](http://upload.wikimedia.org/wikipedia/commons/thumb/7/72/Hubble_Pinpoints_Supernova_Blast.jpg/240px-Hubble_Pinpoints_Supernova_Blast.jpg)
