An observatory is a location used for observing terrestrial and/or celestial events.
The singular possessive form for the noun observatory is observatory's.Example: The observatory's admission is half price for children.
Those are the observatories.
The name of the observatory in Chicago is the Adler Planetarium.
No, Mount Wilson Observatory and Griffith Observatory are two distinct observatories in Los Angeles. Mount Wilson Observatory is located in the San Gabriel Mountains and is known for housing the Hooker Telescope, while Griffith Observatory is located in Griffith Park and is a popular public observatory with educational exhibits and planetarium shows.
The observatory is in Green Bank.
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.