earth1d
100 years ago: Edwin Hubble proved the Milky Way is not the only galaxy in the universe
In the 1920s, astronomers thought that the Milky Way was the entire universe. Hubble's discovery revealed a much bigger ...
Stunning photo mosaic of neighbouring Andromeda Galaxy captures the glow of 200 million stars
To celebrate the 100-year Edwin Hubble discovery that Andromeda was a galaxy outside our own, astronomers release the most ...
Houston Chronicle12d
One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate’
Astronomers as far back as the mid-18th ... At the of age 30, he arrived at Mount Wilson Observatory in Southern California just in time to use the new Hooker 100-inch telescope, at the time ...