Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

At the time, the debate was inconclusive. 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 ...

A century ago, Edwin Hubble unveiled a groundbreaking discovery that revolutionized humanity’s understanding of the cosmos. His identification of a faint star in the Andromeda Galaxy, known as V1, ...

The new composite image, which combines hundreds of photos from the Hubble Space Telescope, shows the Andromeda Galaxy with more than 200 million individually resolved stars.

To celebrate the 100-year Edwin Hubble discovery that Andromeda was a galaxy outside our own, astronomers release the most detailed Andromeda Galaxy image ever.

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 ...

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 ...

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 ...

Astronomers now know that galaxies are isolated systems of stars, much smaller than the space between them. Hubble makes his mark Edwin Hubble was young and ambitious. At the of age 30 ...