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Gaithersburg Latitude Observatory
in Astronomical Observatories
One of six world-wide latitude observatories built in 1899. The precise nightly star measurements from here were used to prove and monitor the "wobble" of the earth on its north-south axis. Satellites replaced these observatories in 1982.
posted by: HaricotVert_52
location: Maryland
date approved: 8/13/2016
last visited: 5/25/2015
SW18.5 km
Turner Farm Observatory - Fairfax, Virginia
Located in Turner Park along the northbound side of Springvale Road.
posted by: flyingmoose
location: Virginia
date approved: 3/16/2021
last visited: 1/29/2022
SE31.7 km
Phoebe Waterman Haas Public Observatory - Washington, DC
An observatory at the National Air and Space Museum, part of the Smithsonian Institution.
posted by: bluesnote
location: District of Columbia
date approved: 11/24/2018
last visited: 11/23/2018