Where did galaxies come from?

Science has only recently been able to explain where the stars and planets came from. Now, scientists have turned their attention to a much bigger mystery, where did galaxies come from? What is known is that galaxies are not scattered randomly throughout space, rather they are found in clusters, known as “super clusters”. Scientists have two main theories to attempt to explain galaxy formation. First, the gas left over from the big bang clustered together to form galaxies, in which stars and planets were born. Second is that gas from the big bang created stars and planets all over the universe, and they migrated through gravity into galaxies. Neither theory has been universally accepted yet.