Physics, 07.01.2021 20:10, tybreyonnaHco7855

HELP ITS MY LAST QUESTION AND ITS URGENT Which discovery by astronomer Vera Rubin helped prove the existence of dark matter? Galaxies exist outside of the Milky Way.
The expansion of the universe is accelerating.
Galaxies spin faster than they should, based on their visible matter.
Gas giants form farther from the Sun, where temperatures are cooler.

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HELP ITS MY LAST QUESTION AND ITS URGENT Which discovery by astronomer Vera Rubin helped prove the e...