Planetariums are usually domed theaters with rows of chairs arranged for people to sit comfortably while watching a video or demonstration about astronomy that is played by a projector and, often times, controlled by an operator.
The Adler Planetarium was built in 1930 and is the oldest planetarium in existence today.
No, it is not an adverb. Planetarium is a noun, an astronomical theater.
Birla planetarium
Hayden Planetarium was created in 1935.
Eisinga Planetarium was created in 1781.
Expensive Planetarium was created in 1962.
Expensive Planetarium happened in 1962.
London Planetarium ended in 2006.
London Planetarium was created in 1958.
Alfa Planetarium was created in 1978.
Jawahar Planetarium was created in 1979.
McLaughlin Planetarium was created in 1968.