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

In the 1920s, astronomers thought that the Milky Way was the entire universe. Hubble's discovery revealed a much bigger ...

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 galaxies in the universe ...

Yet, a century ago, its discovery by Edwin Hubble ... This proportionality between galaxies' distances and redshifts is today termed Hubble–Lemaître's law. Because the universe appeared ...

A hundred years ago, astronomer Edwin Hubble ... second major discovery also transformed astronomers' understanding of the universe. As he dispersed the light from dozens of galaxies into a ...

A hundred years ago, astronomer Edwin Hubble ... second major discovery also transformed astronomers’ understanding of the universe. As he dispersed the light from dozens of galaxies into ...

In commemoration of Edwin Hubble's discovery of a Cepheid variable class ... Edwin Hubble went on to measure the distances to many galaxies beyond the Milky Way by finding Cepheid variables ...

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

Edwin Powell Hubble sitting in a ... born in a time before we knew other galaxies existed. "This is really a lesson of how much things have changed and how discoveries can come at us fast." ...

(THE CONVERSATION) A hundred years ago, astronomer Edwin Hubble dramatically ... D.C. An expanding universe of galaxies But Hubble wasn’t done. His second major discovery also transformed ...