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Lowell Observatory

1400 W Mars Hill Road
Flagstaff, Coconino County, Arizona, 86001

Clark dome
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Lowell Observatory is among the oldest observatories in the United States. It was founded in 1894 by astronomer Percival Lowell, and the Observatory's original 24-inch (0.61 m) Alvan Clark Telescope is still in use today for public education.

The dwarf planet Pluto was discovered at the Lowell Observatory by Clyde Tombaugh in 1930.

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Map of the Area Around
Lowell Observatory