Stellar explosions, also known as supernovae, occur at the end of a star's life cycle. When a massive star exhausts its nuclear fuel, it can no longer support itself against gravitational collapse. This leads to a dramatic explosion that can outshine entire galaxies for a short period, releasing an enormous amount of energy and scattering elements into space. There are two main types of supernovae: Type I and Type II. Type I supernovae happen in binary systems where a white dwarf accumulates material from a companion star, while Type II supernovae result from the collapse of massive stars. Both types play a crucial role in enriching the universe with heavy elements.