What was Hubble's major contribution to Cosmology?
A)He identified Cepheid Variable stars.
B)He measured the size of the universe.
C)He identified numerous new galaxies outside the Milky Way.
D)He developed a new method for measuring the absolute magnitude of stars.
E)He proved the Big Bang Theory.

Question

Quizplus · Accepted Answer

Hubble's major contribution to cosmology was the discovery of numerous galaxies outside the Milky Way, which led to the understanding that the universe is much larger than previously thought.

What Was Hubble's Major Contribution to Cosmology