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PeanutSalsa t1_is625c2 wrote

When it's said the universe is expanding is this only referring to the galaxies moving away from each other or does it include space around the galaxies too?

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cb3f554 t1_is65hpy wrote

Currently expansion exists only on the largest scales (between galaxies). The space around the galaxy is also expanding, but the gravity of the galaxy keeps itself together so no expansion inside (yet)

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