Supernova...

Supernova or dying star, sounds really sad, but is a beautiful process when Stars die because they exhaust their nuclear fuel. The events at the end of a star's life depend on its mass. Really massive stars use up their hydrogen fuel quickly, but are hot enough to fuse heavier elements such as helium and carbon. As the outer layers expand, the radius of the star will increase and it will become a red giant and the inner core collapses into white star. The gas and dust thrown out by the explosion of a dying star, such as a supernova become nabula. Some other  nabula are region where star starts to form.