Changes

 : [[Redshift]] - [[Redshift]] shows that all of the [[galaxy|galaxies]] are moving away from each other at very high [[speed]]. : [[Cosmic Microwave Background]] - [[Microwave]] [[radiation]] coming from all directions in [[space]] show that at one point the entire [[universe]] was roughly the same [[temperature]] everywhere. : Old [[Star]]s - There have not been any [[star]]s [[observe]]d older than 13 billion years.