Which discovery by astronomer Vera Rubin helped prove the existence
Subject : Physics
Question: Which discovery by astronomer Vera Rubin helped prove the existence of dark matter?
A) Galaxies exist outside of the Milky Way.
B) The expansion of the universe is accelerating.
C) Galaxies spin faster than they should, based on their visible matter.
D) Gas giants form farther from the Sun, where temperatures are cooler.
Expert Verified Solution:
The correct answer is
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