Lowell (Martian crater) Lowell (Martian crater) The Lowell Crater is a large impact crater on Aonia Terra in the Thaumasia quadrangle of Mars. The crater is about 203 kilometers (127 miles) in diameter. Lowell Crater has a ring of mountains on its floor which gives it a sort of bull's eye appearance. Its nearby features include the craters Slipher to the north, Douglass to the east, and Coblentz to the southwest, the small mountain Aonia Mons to the west, and Aonia Planum to the southeast. Lowell Crater is named for Percival Lowell who built the Lowell Observatory in Flagstaff, Arizona, in 1894, and
Lowell, Massachusetts is River Meadow, or Hale's Brook. This brook flows largely in a man-made channel, as the Lowell Connector was built along it. Both of these minor streams have limited industrial histories as well. The bordering towns (clockwise from north) are Dracut, Tewksbury, Billerica, Chelmsford, and Tyngsborough. The border with Billerica is a point in the middle of the Concord River where Lowell and Billerica meet Tewksbury and Chelmsford. The ten communities designated part of the Lowell Metropolitan area by the 2000 US Census are Billerica, Chelmsford, Dracut, Dunstable, Groton, Lowell, Pepperell, Tewksbury, Tyngsborough, and Westford, and Pelham, NH. See Greater