Lowell Observatory

observatory, Flagstaff, Arizona, United States

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July 20, 2026

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Lowell Observatory is a private astronomical observatory located in Flagstaff, Arizona. It was founded by Percival Lowell in the 1890s, inspired by observations of Mars. Lowell used the observatory to study Mars, promoting the now-discredited theory of intelligent inhabitants constructing irrigation canals.12

The observatory is also known for its role in the search for a planet beyond Neptune, which ultimately led to the discovery of Pluto in 1930. Flagstaff itself is a significant astronomical center, hosting other observatories and benefiting from its clear skies and high elevation.12

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Today in History—February 18
From Kansas to the Kuiper Belt
…report on Mars written by Lowell Observatory staff, so he sent them his drawings. The director was so impressed that he offered Clyde a job in Flagstaff, Arizona, as an assistant and groundskeeper in January 1929.
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…report on Mars written by Lowell Observatory staff, so he sent them his drawings. The director was so impressed that he offered Clyde a job in Flagstaff, Arizona, as an assistant and groundskeeper in January 1929.
Read More

Carolyn Shoemaker
…were on the staff of Lowell Observatory, Flagstaff, Arizona. By 1994 Carolyn had 32 comet discoveries to her credit, which was more than anyone alive at that time.
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…were on the staff of Lowell Observatory, Flagstaff, Arizona. By 1994 Carolyn had 32 comet discoveries to her credit, which was more than anyone alive at that time.
Read More