Question: (a) Why did astronomers expect that the expansion rate of the universe would be decreasing (decelerating) with time? (b) How, in principle, could astronomers hope

(a) Why did astronomers expect that the expansion rate of the universe would be decreasing (decelerating) with time?
(b) How, in principle, could astronomers hope to determine whether the universe used to expand faster than it does now?

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a Gravity between galaxies should be pulling the galaxies back together slowing the expans... View full answer

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