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3 votes

Will the stars dim in the future because of the expansion of the universe?

Actually not everything is moving apart. On a scale of millions of light years gravity dominates and there isn't metric expansion of space. This is why (for example) the Andromeda galaxy is moving ...
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2 votes

Distance of distant galaxies

Redshift, angular-size distance, and time-since big bang are all ways of describing the distance of an object or (since distance and time are related) the time when the light was emitted. Now, you ...
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