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Lowell Observatory: A Gateway to the Cosmos

Explore the cosmos at Lowell Observatory in Flagstaff, where Pluto was discovered and astronomical history continues to unfold.

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Perched atop Mars Hill in Flagstaff, Arizona, Lowell Observatory is a historic site where groundbreaking astronomical discoveries have been made since 1894, including the discovery of Pluto in 1930. Today, visitors can explore interactive exhibits, tour historic telescopes, and gaze at the night sky through state-of-the-art instruments.

A brief summary to Lowell Observatory

Local tips

  • Arrive early to allow ample time to explore all the exhibits and participate in the various tours and presentations.
  • Check the Lowell Observatory website for special events, tour times, and seasonal programs before your visit.
  • Take advantage of the free solar viewing sessions during the day to safely observe the sun.
  • Dress warmly for evening telescope viewing, as temperatures on Mars Hill can drop significantly.
  • Consider visiting during seasonal events like meteor shower viewings or lunar eclipse parties for an enhanced experience.
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Getting There

  • Driving

    From downtown Flagstaff, head west on Route 66. After Humphreys Street, veer right onto West Santa Fe Avenue, which becomes West Mars Hill Road as you ascend Mars Hill. Continue past the Mars Hill overlook. Visitor parking will be on your left as you arrive at Lowell Observatory, on the south side of the grounds. Parking is free.

  • Public Transport

    Several bus lines stop near Lowell Observatory. From various points in Flagstaff, take bus routes 2, 3, 5, 66, or 7 to the Santa Fe Avenue/Park Street stop. From there, it's an 8-minute walk to the observatory. A single bus fare costs approximately $2. From Flagstaff Pulliam Airport, the most convenient option is to take the Arizona Shuttle bus to Flagstaff Amtrak. This takes about 15 minutes and costs between $2 and $35. From the Amtrak station, you can take a local bus or a taxi to the observatory.

Unlock the Best of Lowell Observatory

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Discover more about Lowell Observatory

Founded in 1894 by Percival Lowell, the Lowell Observatory has been at the forefront of astronomical research for over a century. Situated on Mars Hill, overlooking Flagstaff, Arizona, the observatory was established with the goal of studying Mars, though it soon became renowned for other significant discoveries. Clyde Tombaugh's discovery of Pluto in 1930 remains one of the observatory's most celebrated achievements. The iconic 24-inch Clark Refractor telescope, built in 1896, played a crucial role in mapping the moon for the Apollo 11 mission. V.M. Slipher's work at Lowell led to the first detection of the expanding nature of the universe. Visitors to Lowell Observatory can explore a variety of exhibits and participate in guided tours. The Putnam Collection Center showcases historical artifacts, while the Rotunda Museum delves into the discovery of Pluto and the history of astronomy. The Giovale Open Deck Observatory offers stunning views of celestial objects through modern telescopes. Visitors can also enjoy solar viewing sessions during the day and constellation tours in the evening. The newly opened Marley Foundation Astronomy Discovery Center features the kid-friendly Orbits Curiosity Zone and the Dark Sky Planetarium. Lowell Observatory is not only a place of scientific importance but also plays a role in protecting Flagstaff's dark skies, which benefits both humans and animals.

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