As most of us didn't know, this universe that we live in now is expanding. It has always been expanding since its expansionary birth into existence. The universe exploded into existence from one unique tiny Atom. The universe exploded like a spread into the nothingness but the universe never stopped spreading out every since its birth, so every known thing in this universe is separating from each other which will cause everything to freeze since everything warm is venturing off from each other, this will be the Death of this universe. Suns will separate from plantets, hot stars, cold stars, galaxies, etc will all be separated from the expansion, then will die out. This is expected to happen over 5 billion years from now.