A supernova is a real explosion of a star, when most of its mass (or even all) is thrown off at a speed of up to 10 thousand km / s into space, and the remaining central part turns into a superdense neutron star or even into a black hole. Supernovae play a very important role in evolution of stars, being the “final” of the life of stars with masses of more than 8-10 solar masses. They give birth to neutron stars and black holes and enrich the interstellar medium with heavy chemical elements.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.