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 This equinox happens when the sun, traveling from south to north, crosses the celestial equator, an imaginary plane that extends out into space from the Earth’s equator. Victoria Moorwood, The Enquirer, 14 Mar. 2024 Both terms describe the moment when the sun crosses the celestial equator, moving from south to north. The Arizona Republic, 9 Mar. 2024 This equinox happens when the sun crosses the celestial equator, an imaginary line above the Earth’s equator, going from south to north. Victoria Moorwood, The Enquirer, 26 Feb. 2024 The spring equinox is when the sun crosses the celestial equator — an imaginary line that lines up with the equator on Earth — and the northern hemisphere tilts more often toward the sun. Shaun Goodwin, Idaho Statesman, 23 Jan. 2024 The autumnal equinox happens the moment the sun crosses the celestial equator, which is an imaginary line in the sky that corresponds to Earth’s equator. Michael D'estries, Treehugger, 31 Aug. 2023 The equinox The autumnal equinox — the moment when the center of the Sun crosses the celestial equator and moves into the sky’s Southern Hemisphere — takes place Sept. 23 at 2:50 a.m. Geoff Chester, Washington Post, 1 Sep. 2023 During an equinox, the sun crosses an imaginary extension of Earth’s equator line called the celestial equator. Laura Baisas, Popular Science, 1 Oct. 2020 Wide-field image of the Orion Constellation, a prominent constellation located on the celestial equator and visible throughout the world. Popular Mechanics, 18 Apr. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'celestial equator.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1848, in the meaning defined above

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

Dictionary Entries Near celestial equator

Cite this Entry

“Celestial equator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/celestial%20equator. Accessed 21 Apr. 2024.

Kids Definition

celestial equator

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

More from Merriam-Webster on celestial equator

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