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3 May, 01:37

When we say the universe is expanding, we mean that:a. Everything in the universe is growing in size. b. The average distance between galaxies is growing with time. c. The universe is getting older.

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  1. 3 May, 02:06
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    Answer: They mean that it has been growing ever since its beginning with the Big Bang. The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest.
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