Universes expand primarily due to the absence of counterforces, specifically gravity, which has proven insufficient to halt this expansion. Current observations indicate that our universe is expanding at an accelerating rate due to dark energy, a phenomenon that complicates any potential reversal of this expansion. While the existence of multiple universes remains unproven, the laws governing them may differ significantly from our own, leading to varied expansion behaviors.
PREREQUISITESAstronomers, physicists, cosmologists, and anyone interested in the fundamental principles of universe expansion and the nature of dark energy.
sherlock ohms said:would it be fair to say that Universes(??) on all scales, which consist of 'something', expand for the very simple reason that there is, quite literally, 'nothing' to prevent them from doing so?
(question based on random musings..)