Lowell Observatory

Astronomer Percival Lowell established this facility in 1894, 1mi west of downtown Flagstaff. Here in 1930, Clyde Tombaugh discovered the tiny outer planet (since stripped of its planet-status) Pluto by photographing sections of the night sky at six-day intervals and looking for movements in the minuscule dots of light. Stars don't change position; the tiny point of light that did was identified as a planet. Lowell's own 24in Clark refracting telescope is on display and in use during frequent nighttime sky-viewing sessions. Interactive exhibits focus on basic astronomy and space travel.

Useful information


1400 Mars Hill Road, 86001-4470 Flagstaff


+1 928-774-3358


12 $ (-17 years old 6 $)

Opening hours

Jun-Aug: 9am-10pm; Sep-Oct, Mar-May: Mon, Wed, Fri, Sat 9am-9.30pm, Tue, Thu, Sun 9am-5pm. Nov-Feb: Mon, Wed, Fri, Sat noon-9.30pm, Tue, Thu, Sun noon-5pm - closed 1 Jan, 24-25 Dec, 31 Dec

Nearby tourist attractions

Museum of Northern Arizona
Museum of Northern Arizona
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