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Astronomy
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Possible Futures of the Universe
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Astronomy
AST.252 Possible Futures of the Universe
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Which future scenario requires the expansion rate to fall to zero and then become contraction?
A
A Big Freeze with positive constant dark energy.
B
A Big Crunch or turnaround model.
C
A Big Rip with rising phantom energy.
D
An eternally coasting low-density universe.
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