thumb|300px|right|SN 1054 remnant (Crab Nebula). A supernova remnant (SNR) is the structure resulting from the explosion of a star in a supernova. The supernova remnant is bounded by an expanding shock wave, and consists of ejected material expanding from the explosion, and the interstellar material it sweeps up and shocks along the way.
thumb|300px|right|SN 1054 remnant (Crab Nebula). A supernova remnant (SNR) is the structure resulting from the explosion of a star in a supernova The supernova remnant is bounded by an expanding shock wave and consists of ejected material expanding from the explosion, and the interstellar material it sweeps up and shocks along the way