Lowell Observatory: Flagstaff, AZ: Lawrence 13-inch refracting telescope was used to discover the planet Pluto by Clyde Tombough: pictured is the tele

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Lowell Observatory: Flagstaff, AZ: Lawrence 13-inch refracting telescope was used to discover the planet Pluto by Clyde Tombough: pictured is the telescope's 14x17-inch photographic plate holder for the camera

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Size: 4000px × 6000px
Photo credit: © Lonnie Paulson / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: arizona, astronomy, astrophotography, clyde, film, flagstaff, glass, holder, lowell, observatory, optics, photographic, photography, plate, pluto, science, space, telescope, tombough