In 1899, Gaithersburg was selected as one of six global locations for the construction of an International Latitude Observatory as part of a project to measure the Earth's wobble on its polar axis. The Gaithersburg Latitude Observatory is (as of 2007) the only National Historic Landmark in the City of Gaithersburg. The observatory and five others in Japan, Italy, Russia, and the United States gathered information that is still used by scientists today, along with information from satellites, to determine polar motion; the size, shape, and physical properties of the earth; and to aid the space program through the precise navigational patterns of orbiting satellites. The Gaithersburg station operated until 1982 when computerization rendered the manual observation obsolete.
In 1899, Gaithersburg was selected as one of six global locations for the construction of an International Latitude Observatory as part of a project to measure the Earth's wobble on its polar axis. The Gaithersburg Latitude Observatory is (as of 2007) the only National Historic Landmark in the City of Gaithersburg. The observatory and five others in Japan, Italy, Russia, and the United States gathered information that is still used by scientists today, along with information from satellites, to determine polar motion; the size, shape, and physical properties of the earth; and to aid the space program through the precise navigational patterns of orbiting satellites. The Gaithersburg station operated until 1982 when computerization rendered the manual observation obsolete.