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
Lowell, Arkansas north of Bentonville and south to Fayetteville and to Fort Smith. Highway 264 is a main east-west road in Lowell, connecting I-49 and US 71B. Water and sewer service in Lowell is mostly provided by Springdale Water Utilities, with a small portion of northern Lowell receiving service from Rogers Water Utilities. Subdivisions in western Lowell operate on decentralized sewer systems due to a lack of available gravity sewer service. Potable water for much of Northwest Arkansas is treated by Beaver Water District's water treatment plant, located in eastern Lowell near Beaver Lake. Wastewater is collected by gravity sewer and sent