Gaithersburg Latitude Observatory was created in 1899.
Gaithersburg High School was created in 1904.
Latitude: 39°7′55″NLongitude: 77°13′35″W
Gaithersburg, Maryland.
Longitude: 77° 12' 04'' West Latitude: 39° 08' 36'' North
Haleakala Observatory was created in 1961.
Dearborn Observatory was created in 1889.
Kiso Observatory was created in 1974.
Stellafane Observatory was created in 1924.
Steward Observatory was created in 1916.
Union Observatory was created in 1903.
Erbil Observatory was created in 1973.
Sherwood Observatory was created in 1970.