celestial equator
noun
: the great circle on the celestial sphere midway between the celestial poles
Examples of celestial equator in a Sentence
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This rare timing means the eclipse occurs on the doorstep of the September equinox, when the sun crosses the celestial equator, marking the start of spring in the Southern Hemisphere and fall in the north.
—
Daisy Dobrijevic, Space.com, 21 Sep. 2025
Due to the sun crossing the celestial equator, there are an equal number of day and evening hours.
—Lisa Stardust, Refinery29, 19 Sep. 2025
The tropical zodiac begins at zero degrees of Aries — beginning at the spring equinox in the northern hemisphere — which is the exact moment the Sun crosses the celestial equator, moving from South to North.
—Valerie Mesa, PEOPLE, 10 Sep. 2025
That’s when day and night are roughly equal in length, and the sun crosses the celestial equator heading south.
—Vanessa Countryman, USA Today, 5 Sep. 2025
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Daisy Dobrijevic, Space.com, 21 Sep. 2025
Due to the sun crossing the celestial equator, there are an equal number of day and evening hours.
—Lisa Stardust, Refinery29, 19 Sep. 2025
The tropical zodiac begins at zero degrees of Aries — beginning at the spring equinox in the northern hemisphere — which is the exact moment the Sun crosses the celestial equator, moving from South to North.
—Valerie Mesa, PEOPLE, 10 Sep. 2025
That’s when day and night are roughly equal in length, and the sun crosses the celestial equator heading south.
—Vanessa Countryman, USA Today, 5 Sep. 2025
See All Example Sentences for celestial equator
Cite this Entry
“Celestial equator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/celestial%20equator. Accessed 31 Oct. 2025.
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