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 Griffith Observatory’s website is a terrific resource, with monthly sky reports and links to dozens of active local astronomy clubs and planetariums.
—
Laura Randall, Los Angeles Times, 16 May 2024
The new Niagara Parks Power Station + Tunnel will host several events, such as a mobile planetarium and interactive talks with NASA and CSA scientists, including a guest speaker who will discuss astronomy from an Indigenous perspective.
—Kathleen Wong, USA TODAY, 15 Mar. 2024
See all Example Sentences for planetarium 
Laura Randall, Los Angeles Times, 16 May 2024
The new Niagara Parks Power Station + Tunnel will host several events, such as a mobile planetarium and interactive talks with NASA and CSA scientists, including a guest speaker who will discuss astronomy from an Indigenous perspective.
—Kathleen Wong, USA TODAY, 15 Mar. 2024
See all Example Sentences for planetarium
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'planetarium.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Planetarium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/planetarium. Accessed 1 Jun. 2024.
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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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