which discovery by astronomer vera rubin helped prove the existence of dark matter?\no galaxies exist…

which discovery by astronomer vera rubin helped prove the existence of dark matter?\no galaxies exist outside of the milky way.\no the expansion of the universe is accelerating.\no galaxies spin faster than they should, based on their visible matter.\no gas giants form farther from the sun, where temperatures are cooler.

which discovery by astronomer vera rubin helped prove the existence of dark matter?\no galaxies exist outside of the milky way.\no the expansion of the universe is accelerating.\no galaxies spin faster than they should, based on their visible matter.\no gas giants form farther from the sun, where temperatures are cooler.

Answer

Brief Explanations:

Vera Rubin's work focused on galaxy rotation curves. She found that galaxies spin faster than expected based on the amount of visible matter, which implies the presence of unseen mass - dark matter. The other options are not related to her work on dark - matter evidence.

Answer:

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