Lowell Observatory Lowell Observatory Lowell Observatory is an astronomical observatory in Flagstaff, Arizona, United States. Lowell Observatory was established in 1894, placing it among the oldest observatories in the United States, and was designated a National Historic Landmark in 1965. In 2011, the Observatory was named one of "The World's 100 Most Important Places" by TIME. It was at the Lowell Observatory that the dwarf planet Pluto was discovered in 1930 by Clyde Tombaugh. The observatory was founded by astronomer Percival Lowell of Boston's Lowell family and is overseen by a sole trustee, a position historically handed down through the family. The
The Lowell Mount Auburn Street instead of Brattle (under pressure from wealthy Brattle Street residents), a decision that reduced interest in building more multiunit housing in that area. The building was listed on the National Register of Historic Places in 1983. The Lowell The Lowell is an historic triple decker apartment house on 33 Lexington Avenue in Cambridge, Massachusetts. Built in 1900 to a design by local architect John Hasty, it is a rare multiunit building in the Brattle Street area outside Harvard Square. The Colonial Revival building has a swan's neck pediment above the center entry, which is echoed above the