Mount Wilson Observatory
Observatory · Mount Wilson, California
The observatory on the ridge above Pasadena where Edwin Hubble established, in the 1920s, that other galaxies exist beyond our own and that the universe is expanding. He did it with the 100-inch Hooker telescope, which was the largest in the world for thirty years and is still in its dome, and which you can walk up to and look at.
Mount Wilson Road, Angeles National Forest, Mount Wilson, California, 91023, United States
Seasonal, generally April to November; road closes in snow. Grounds open daily, tours and café at weekends.
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