Hubble provided the evidence, proving that philosopher Immanuel Kant's hypothesis, that some nebula were other galaxies, was correct. But see also: http://onem

Hubble provided the evidence, proving that philosopher Immanuel Kant's hypothesis, that some nebula were other galaxies, was correct. But see also: http://oneminuteastronomer.com/1562/mule-driver-measure-universe/ http://oneminuteastronomer.com/1562/mule-driver-measure-univ...