Three College Observatory was created in 1979.
Vassar College Observatory was created in 1865.
Five College Radio Astronomy Observatory was created in 1969.
Erbil Observatory was created in 1973.
Steward Observatory was created in 1916.
Bosscha Observatory was created in 1923.
Mead Observatory was created in 2001.
Goodsell Observatory was created in 1886.
Cloudcroft Observatory was created in 1962.
Foothill Observatory was created in 1965.
Union Observatory was created in 1903.
Sherwood Observatory was created in 1970.
Custer Observatory was created in 1947.