The discussion emphasizes the preference for the Hubble Law as the explanation for cosmological expansion, asserting that distant galaxies are moving apart rather than space-time itself stretching. It clarifies that spacetime does not stretch near black holes; instead, it is curved. Furthermore, the conversation highlights that the concepts of "distant galaxies moving apart" and "spacetime being curved" are two perspectives of the same phenomenon, reinforcing the validity of the Hubble Law in understanding cosmic expansion.
PREREQUISITESAstronomers, physicists, and students of cosmology seeking to deepen their understanding of cosmic expansion and the fundamental principles governing the universe.
Rene Kail said:Why should you prefer the view that cosmological expansion is due to distant galaxies moving apart according to the Hubble Law instead of cosmic space stretching, like stretching of space(-time) in the vicinity of black holes?