The telescope used to discover the Martian moons, two moons of Mars, Deimos and Phobos, in 1877. United States Naval Observatory

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Photo credit: © GL Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: &, archival, archive, astronomy, black, giant, historic, historical, history, image, images, large, monochrome, people, person, persons, telescope, vintage, white