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Lowell Observatory: Where Stars are Discovered

Explore the cosmos at Lowell Observatory in Flagstaff, Arizona, 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 astronomical research center and a captivating destination for space enthusiasts. Founded in 1894 by Percival Lowell, it's renowned as the place where Pluto was discovered in 1930. Today, visitors can explore exhibits, tour historic telescopes, and attend stargazing sessions.

A brief summary to Lowell Observatory

Local tips

  • Check the weather forecast before your visit, especially if you plan to stargaze.
  • Dress in layers, as temperatures can vary, especially at night.
  • Wear comfortable shoes, as you'll be doing a moderate amount of walking on inclines.
  • Arrive early to allow ample time to explore all the exhibits and participate in tours.
  • If you're sensitive to high altitudes, pace yourself and stay hydrated.
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Getting There

  • Driving

    Lowell Observatory is located at 1400 W Mars Hill Rd, Flagstaff, AZ 86001, just west of downtown Flagstaff. From I-40, take Milton Road north. Turn west onto Santa Fe Avenue, which becomes W Mars Hill Road. Follow Mars Hill Road up the hill to the observatory. Parking is free and located on the left as you arrive. Overnight parking and camping are not permitted.

  • Public Transport

    Several Flagstaff city bus lines stop near Lowell Observatory. From the Flagstaff Amtrak station, catch a bus to the Santa Fe/Park WB stop. From there, it is an 8-minute walk to the observatory. Bus fares typically cost a few dollars. Check local bus schedules for the most up-to-date information.

  • Taxi/Ride-Share

    Taxis and ride-sharing services like Uber and Lyft are available in Flagstaff. A taxi or ride-share from downtown Flagstaff to Lowell Observatory typically costs $15-$20 and takes approximately 10-15 minutes, depending on traffic.

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Discover more about Lowell Observatory

Lowell Observatory, a National Historic Landmark, sits at an elevation of 7,250 feet on Mars Hill overlooking downtown Flagstaff. Founded in 1894 by Percival Lowell, the observatory was initially established to study Mars. Over the years, it has become one of the most important astronomical sites in the United States. Clyde Tombaugh discovered Pluto here in 1930, using the 13-inch Lawrence Lowell Telescope. Visitors can explore the observatory's rich history through various exhibits and tours. The Putnam Collection Center showcases historical artifacts, while the Rotunda Museum delves into the discovery of Pluto and the Apollo program's lunar mapping efforts. The iconic 24-inch Clark Refractor, built in 1896, played a crucial role in lunar mapping for the Apollo missions and is still operational. The newly opened (November 2024) Marley Foundation Astronomy Discovery Center offers interactive exhibits, a planetarium, and state-of-the-art telescopes. Visitors can participate in science talks, constellation tours, and stargazing sessions. During the day, solar viewing sessions are available. Lowell Observatory continues to be a significant research facility, contributing to our understanding of the universe. It also plays a vital role in education and public outreach, inspiring future generations of astronomers.

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