A supernova is the explosion of a star when it has ultimately reached the end stages of its life. After a supernova explosion, the star's gaseous remains are fired into space at insanely high speeds. But these gases do not just simply fade away into nothingness. Instead, these gases form the most fascinating and unique object ever found, a nebula.
'What is a nebula?', you may ask. Well, a nebula is a cloud of dust and gas in outer space. I find nebulas very beautiful, they hold whole star systems with planets, maybe even capable of wielding life on their surface.