Astronomers now know that galaxies are isolated systems of stars, much smaller than the space between them. Edwin Hubble was young and ambitious. At the of age 30, he arrived at Mount Wilson ...

other galaxies in their own right. The scale of the cosmos had expanded dramatically virtually overnight. According to historical records, we have one man to thank for this: Edwin Hubble.

Curtis argued that the spiral nebulas were galaxies in their own right, but said that the Milky Way was only 10,000 light years across. Shapley argued the opposite. Hubble enters the fray Edwin ...

Yet, a century ago, its discovery by Edwin Hubble opened humanity's eyes as to how large the universe really is, and revealed that our Milky Way galaxy is just one of hundreds of billions of ...

The Andromeda galaxy helped Edwin Hubble settle a great debate in astronomy. Stocktrek Images via Getty Images ...

Edwin Hubble went on to measure the distances to many galaxies beyond the Milky Way ... which is operated by the Association of Universities for Research in Astronomy, conducts Hubble science ...

Edwin Hubble was the first astronomer to take the initial steps that would ultimately lead to the Hubble Space Telescope, revealing a seemingly infinite ocean of galaxies. He thought that ...