Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.
Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.
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Heres another question guys:
If we were indeed living in a big crunch universe, would the universe take as much time to crunch as it did to expand? As an example, take the analogy of throwing a ball into the air; the ball takes the same amount of time to go up as to come down, even given the change of velocity.
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Big Crunch has been ruled out on the account that spatial expansion is accelerating. If gravity were contracting the universe the opposite would be true. The expansion should be slowing down as a consequence of gravity; but it is not.
Mitch Raemsch
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