How Edwin Hubble won the Great Debate

By the dawn of the 20th century, not much had changed in the 400 years since Galileo’s discovery of the four jovian moons and his confirmation of Copernicus’ Sun-centered solar system.  Through the early 1900s, astronomers disagreed on whether the universe was home to a multitude of galaxies, so-called “island universes,” or contained entirely withinContinue reading “How Edwin Hubble won the Great Debate”
The post How Edwin Hubble won the Great Debate appeared first on Astronomy Magazine.