celestial equator
Example Sentences
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This region is positioned near the celestial equator and close to the flat disk of the Milky Way, which makes it visible from many locations on Earth during certain seasons.
From Science Daily ● Dec. 25, 2025
Fall officially kicks off Friday at 11:50 p.m. with the fall equinox, the moment the sun crosses the celestial equator, an imaginary line above earth’s equator.
From Seattle Times ● Sep. 21, 2023
Standing by the Hunter’s foot, the Great Dog is an easy-to-find constellation visible from most areas of the world, thanks to being positioned just south of the celestial equator.
From National Geographic ● Aug. 23, 2023
And whereas Ptolemy based his coordinate system on the ecliptic, Hipparchus used the celestial equator, a system more common in modern star maps.
From Scientific American ● Oct. 20, 2022
Right ascension, corresponding to terrestrial longitude, is the angular distance of a heavenly body from the vernal equinox measured on the celestial equator eastward to the hour circle passing through the body.
From Astronomical Lore in Chaucer by Florence M. Grimm
