celestial equator

noun

: the great circle on the celestial sphere midway between the celestial poles

Examples of celestial equator in a Sentence

Recent Examples on the Web
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During the equinox, the sun travels south to north across the celestial equator. Kaitlyn McCormick, USA Today, 26 Mar. 2026 Auroral activity is expected to be especially strong in March, thanks to the March 20 spring equinox, when the sun will cross the celestial equator. Lucia Cheng, Des Moines Register, 20 Mar. 2026 On this day, the sun crosses the celestial equator, resulting in nearly equal amounts of daylight and darkness across the globe. Vytas Reid, CBS News, 20 Mar. 2026 That puts the sun high in our sky at its maximum separation north of the celestial equator, making our days much longer than our nights. Mike Lynch, Twin Cities, 15 Mar. 2026 See All Example Sentences for celestial equator

Word History

First Known Use

1848, in the meaning defined above

Time Traveler
The first known use of celestial equator was in 1848

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Cite this Entry

“Celestial equator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/celestial%20equator. Accessed 2 Apr. 2026.

Kids Definition

celestial equator

noun
: the great circle on the celestial sphere midway between the celestial poles

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