Physics, 08.08.2019 21:20, 100011

What does it mean to say that the universe is expanding? what is expanding? for example, is your astronomy classroom expanding? is the solar system? why or why not?

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Physics, 22.06.2019 21:50, WampWamp8751

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What does it mean to say that the universe is expanding? what is expanding? for example, is your a...