Which astronomer definitively established the existence of galaxies outside the Milky Way?
A) Galileo
B) William Herschel
C) Harlow Shapley
D) Edwin Hubble

Question

Quizplus · Accepted Answer

Edwin Hubble definitively established the existence of galaxies outside the Milky Way through his observations and measurements of the Andromeda galaxy and other distant nebulae in the early 20th century.

Which Astronomer Definitively Established the Existence of Galaxies Outside the Milky