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
Jura Observatory was created in 1993.
Detroit Observatory was created in 1854.
Sphinx Observatory was created in 1937.
Ursa Observatory was created in 1926.
Carter Observatory was created in 1937.
Corralitos Observatory was created in 1961.
Stonyhurst Observatory was created in 1838.
Cincinnati Observatory was created in 1843.