which discovery by astronomer vera rubin helped prove the existence of dark matter?\ngalaxies exist outside…

which discovery by astronomer vera rubin helped prove the existence of dark matter?\ngalaxies exist outside of the milky way.\nthe expansion of the universe is accelerating.\ngalaxies spin faster than they should, based on their visible matter.\ngas giants form farther from the sun, where temperatures are cooler.

which discovery by astronomer vera rubin helped prove the existence of dark matter?\ngalaxies exist outside of the milky way.\nthe expansion of the universe is accelerating.\ngalaxies spin faster than they should, based on their visible matter.\ngas giants form farther from the sun, where temperatures are cooler.

Answer

Brief Explanations:

Vera Rubin observed that galaxies spin faster than expected based on the amount of visible matter they contain. This led to the idea that there is unseen matter (dark matter) providing additional gravitational pull.

Answer:

Galaxies spin faster than they should, based on their visible matter.