A Supernova explosion and the evolution of a supernova remnant

Supernova remnants  (SNR) are one of the four categories of nebulae that may exist in a Galaxy (the other three are, diffuse, dark, and planetary nebulae). Everything in the Universe evolves and changes with time, and SNRs are no exception. So, let’s see how a supernova explosion happens, and see the evolution of  the resulting … Read more A Supernova explosion and the evolution of a supernova remnant