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

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

The Bullseye is now confirmed to have nine rings, eight of which are visible to Hubble. Researchers confirmed the existence ...

In the century since Hubble's pioneering work, astronomers like me have learned that the universe is vast and contains ...

Explore HubbleHubble HomeOverviewAbout HubbleThe History of HubbleHubble TimelineWhy Have a Telescope in Space?Hubble by the ...

NASA's Hubble Space Telescope spotted a cosmic Bullseye galaxy, revealing evidence of a rare kind of galactic collision.

A century ago, Edwin Hubble first established that this so-called 'spiral nebula' was actually very far outside our own Milky Way galaxy -- at a distance of approximately 2.5 million light-years ...

The Andromeda galaxy is approximately 2.5 million light-years away from the Milky Way. The observations recorded by Hubble yield new clues about the history of Andromeda, which looks markedly ...

His measurements marked the end of the Great Debate about the Milky Way’s size and the nature of the nebulae. Hubble wrote about his discovery to Harlow Shapley, who had argued that the Milky ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Circa 1945: Astronomer Dr. Edwin Powell Hubble sitting in a chair at a desk reading a journal.