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
William Lowell Putnam the Observatory staff. Putnam, however, had to make the final decision on the matter and he was the one to tell See that he had been dismissed. When Lowell returned to work in 1901, Putnam resumed his role as the financial and legal power behind the Observatory. He also continued his other business in Boston and New York City. When Lowell died in 1916, Putnam was placed in charge of investing Lowell's estate for the Observatory. Putnam died in June 1923, aged around 61, during Constance Lowell's attempt to contest Percival's will. Constance Lowell later asked William's son, Augustus, to