![Edwin Hubble at the controls of the 100-inch Hooker Telescope at Mount Wilson (~1922). Here he was to discover that the Universe was not entirely contained within the Milky Way (as was Edwin Hubble at the controls of the 100-inch Hooker Telescope at Mount Wilson (~1922). Here he was to discover that the Universe was not entirely contained within the Milky Way (as was](https://i.redd.it/3anontfg43241.jpg)
Edwin Hubble at the controls of the 100-inch Hooker Telescope at Mount Wilson (~1922). Here he was to discover that the Universe was not entirely contained within the Milky Way (as was
![Photograph of the Hooker telescope, a 100-inch reflecting telescope located at the Mount Wilson Observatory, California. Dated 20th Century Stock Photo - Alamy Photograph of the Hooker telescope, a 100-inch reflecting telescope located at the Mount Wilson Observatory, California. Dated 20th Century Stock Photo - Alamy](https://c8.alamy.com/comp/KJ1MC2/photograph-of-the-hooker-telescope-a-100-inch-reflecting-telescope-KJ1MC2.jpg)
Photograph of the Hooker telescope, a 100-inch reflecting telescope located at the Mount Wilson Observatory, California. Dated 20th Century Stock Photo - Alamy
![Edwin Hubble looking through the 100-inch Hooker telescope at Mount Wilson in Southern California, 1929 discovers the Universe is Expanding. Credit: Margaret Bourke-White/Time & Life Pictures/Getty Images. | sciencesprings Edwin Hubble looking through the 100-inch Hooker telescope at Mount Wilson in Southern California, 1929 discovers the Universe is Expanding. Credit: Margaret Bourke-White/Time & Life Pictures/Getty Images. | sciencesprings](https://sciencesprings.files.wordpress.com/2019/02/edwin-hubble-looking-through-a-100-inch-hooker-telescope-at-mount-wilson-in-southern-california.jpg?w=624)
Edwin Hubble looking through the 100-inch Hooker telescope at Mount Wilson in Southern California, 1929 discovers the Universe is Expanding. Credit: Margaret Bourke-White/Time & Life Pictures/Getty Images. | sciencesprings
![The 100-year-old telescope at Mt. Wilson that changed cosmology forever | LAist - NPR News for Southern California - 89.3 FM The 100-year-old telescope at Mt. Wilson that changed cosmology forever | LAist - NPR News for Southern California - 89.3 FM](https://scpr.brightspotcdn.com/dims4/default/3169ec0/2147483647/strip/true/crop/6004x3698+584+0/resize/880x542!/quality/90/?url=https%3A%2F%2Fa.scpr.org%2F176525_82c0c8889da813f6baa00a48f4633730_original.jpg)
The 100-year-old telescope at Mt. Wilson that changed cosmology forever | LAist - NPR News for Southern California - 89.3 FM
![Mount Wilson Observatory on Twitter: "This is what the 100" primary mirror sees when the mirror shutter opens. A rare view of the Hooker telescope's interior, secondary, and tertiary mirrors courtesy of Mount Wilson Observatory on Twitter: "This is what the 100" primary mirror sees when the mirror shutter opens. A rare view of the Hooker telescope's interior, secondary, and tertiary mirrors courtesy of](https://pbs.twimg.com/media/EyAoW30VEAE4cq_.jpg)
Mount Wilson Observatory on Twitter: "This is what the 100" primary mirror sees when the mirror shutter opens. A rare view of the Hooker telescope's interior, secondary, and tertiary mirrors courtesy of
![Introduction - Mount Wilson Observatory: Topics in Chronicling America - Research Guides at Library of Congress Introduction - Mount Wilson Observatory: Topics in Chronicling America - Research Guides at Library of Congress](https://www.loc.gov/rr/news/libimages/mount-wilson-observatory.jpg)