Question: When Galaxies are being drawn into clusters, does expansion of the universe enter into the equation? In other words, does expansion effect clustering? :shy:
Well, it's probably more astronomers studying galaxies (cosmologists only run computer models and make theories :tongue2:)Blueplanetbob said:Dark matter would increase the gravitational attraction. As I understand it, the strongest evidence for dark matter comes from cosmologists studying the behaviour of galaxies. although do they take into account the possible existence of black holes at the centre of each galaxy?