planetarium
noun
plan·e·tar·i·um
ˌpla-nə-ˈter-ē-əm 
plural planetariums or planetaria
ˌpla-nə-ˈter-ē-ə
1
: a model or representation of the solar system
2
a
: an optical device for projecting various celestial images and effects
b
: a building or room housing such a projector
Examples of planetarium in a Sentence
Recent Examples on the Web
The Franklin Institute, a science museum with a planetarium, is 10 minutes away on foot, as are a Giant supermarket and a Trader Joe’s.
—
Angela Serratore, New York Times, 15 Jan. 2025
The 500,000-square-foot museum (slated to open sometime in 2025) will be home to both a planetarium and a giant-screen theater, as well as a spiraling ramp resembling a twisting DNA strand that also acts as exhibition space.
—Laura Kiniry, Smithsonian Magazine, 14 Jan. 2025
Then, later in the evening, a glitzy after-party saw J. Harrison Ghee, Lea DeLaria, Eden Espinosa, Titus Burgess, Matthew Morrison, Marisa Jaret Winokur, and more dance under the planetarium at the American Museum of Natural History.
—Juan A. Ramírez, Vogue, 22 Nov. 2024
The rooftop viewing area uses Flagstaff’s dark skies as a natural planetarium dome.
—Roger Naylor, The Arizona Republic, 1 Jan. 2025
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Angela Serratore, New York Times, 15 Jan. 2025
The 500,000-square-foot museum (slated to open sometime in 2025) will be home to both a planetarium and a giant-screen theater, as well as a spiraling ramp resembling a twisting DNA strand that also acts as exhibition space.
—Laura Kiniry, Smithsonian Magazine, 14 Jan. 2025
Then, later in the evening, a glitzy after-party saw J. Harrison Ghee, Lea DeLaria, Eden Espinosa, Titus Burgess, Matthew Morrison, Marisa Jaret Winokur, and more dance under the planetarium at the American Museum of Natural History.
—Juan A. Ramírez, Vogue, 22 Nov. 2024
The rooftop viewing area uses Flagstaff’s dark skies as a natural planetarium dome.
—Roger Naylor, The Arizona Republic, 1 Jan. 2025
See all Example Sentences for planetarium
Dictionary Entries Near planetarium
Cite this Entry
“Planetarium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/planetarium. Accessed 1 Feb. 2025.
Copy CitationKids Definition
planetarium
noun
plan·e·tar·i·um
ˌplan-ə-ˈter-ē-əm
plural planetariums or planetaria
-ē-ə
1
: a device that projects images of heavenly bodies on a ceiling shaped like a dome
2
: a building or room housing a planetarium
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