#Supernova is the last dying gasp of a star as it goes dark.
A #nova, on the other hand, requires two stars. One star is always a white dwarf, while the other is usually a red giant.
#Hypernovas are supernovas that achieve a certain size and brightness. Usually, they're about 10 or more times brighter than a standard supernova. Another type, an extremely rare #kilonova occurs when two neutron stars collide, releasing an incredible gravitational wave.