How does the expansion of the universe make outer space a vacuum?

answer please

Megha Suri
Tuesday, 12 January 2021 09:01 AM
The vacuum of outer space is not caused by the expansion of the universe, but is caused by gravity.There would still be things like vacuum fluctuations, gravity, and dark matter, which can't be sucked out. With that said, outer space is very close to empty compared to earth's atmosphere.