What Does Celestial Equator Mean?

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What does celestial equator mean?

Definitions for celestial equatorce·les·tial equa·tor

This dictionary definitions page includes all the possible meanings, example usage and translations of the word celestial equator.

Princeton's WordNetRate this definition:0.0 / 0 votes

1. celestial equator, equinoctial circle, equinoctial line, equinoctialnoun

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

WiktionaryRate this definition:0.0 / 0 votes

1. celestial equatornoun

   A great circle on the celestial sphere, coincident with the plane of earth's equator.

WikipediaRate this definition:0.0 / 0 votes

1. Celestial equator

   The celestial equator is the great circle of the imaginary celestial sphere on the same plane as the equator of Earth. By extension, it is also a plane of reference in the equatorial coordinate system. In other words, the celestial equator is an abstract projection of the terrestrial equator into outer space. Due to Earth's axial tilt, the celestial equator is currently inclined by about 23.44° with respect to the ecliptic (the plane of Earth's orbit), but has varied from about 22.0° to 24.5° over the past 5 million years due to perturbation from other planets. An observer standing on Earth's equator visualizes the celestial equator as a semicircle passing through the zenith, the point directly overhead. As the observer moves north (or south), the celestial equator tilts towards the opposite horizon. The celestial equator is defined to be infinitely distant (since it is on the celestial sphere); thus, the ends of the semicircle always intersect the horizon due east and due west, regardless of the observer's position on Earth. At the poles, the celestial equator coincides with the astronomical horizon. At all latitudes, the celestial equator is a uniform arc or circle because the observer is only finitely far from the plane of the celestial equator, but infinitely far from the celestial equator itself.Astronomical objects near the celestial equator appear above the horizon from most places on earth, but they culminate (reach the meridian) highest near the equator. The celestial equator currently passes through these constellations: These are the most globally visible constellations. Over thousands of years, the orientation of Earth's equator and thus the constellations the celestial equator passes through will change due to axial precession. Celestial bodies other than Earth also have similarly defined celestial equators.

ChatGPTRate this definition:0.0 / 0 votes

1. celestial equator

   The celestial equator is an imaginary line in the sky that is directly above the Earth's equator. It divides the celestial sphere into the northern and southern hemispheres, similar to how the Earth's equator divides the planet into the northern and southern hemispheres. All celestial bodies directly above the Earth's equator are located on the celestial equator.

WikidataRate this definition:0.0 / 0 votes

1. Celestial equator

   The celestial equator is a great circle on the imaginary celestial sphere, in the same plane as the Earth's equator. In other words, it is a projection of the terrestrial equator out into space. As a result of the Earth's axial tilt, the celestial equator is inclined by 23.4° with respect to the ecliptic plane. An observer standing on the Earth's equator visualizes the celestial equator as a semicircle passing directly overhead through the zenith. As the observer moves north, the celestial equator tilts towards the southern horizon. The celestial equator is defined to be infinitely distant; thus the observer always sees the ends of the semicircle disappear over the horizon exactly due east and due west, regardless of the observer's position on Earth. At all latitudes the celestial equator appears perfectly straight because the observer is only finitely far from the plane of the celestial equator but infinitely far from the celestial equator itself. Celestial objects near the celestial equator are visible worldwide, but they culminate the highest in the sky in the tropics. The celestial equator currently passes through these constellations:

Matched Categories

1. • Great Circle

How to pronounce celestial equator?

1. AlexUS EnglishDavidUS EnglishMarkUS EnglishDanielBritishLibbyBritishMiaBritishKarenAustralianHayleyAustralianNatashaAustralianVeenaIndianPriyaIndianNeerjaIndianZiraUS EnglishOliverBritishWendyBritishFredUS EnglishTessaSouth African

How to say celestial equator in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of celestial equator in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of celestial equator in Pythagorean Numerology is: 3

References

1. ^ Princeton's WordNethttp://wordnetweb.princeton.edu/perl/webwn?s=celestial equator
2. ^ Wiktionaryhttps://en.wiktionary.org/wiki/Celestial_Equator
3. ^ Wikipediahttps://en.wikipedia.org/wiki/Celestial_Equator
4. ^ ChatGPThttps://chat.openai.com
5. ^ Wikidatahttps://www.wikidata.org/w/index.php?search=celestial equator

Translations for celestial equator

From our Multilingual Translation Dictionary

• небесен екваторBulgarian
• nebeský rovníkCzech
• ουράνιος ισημερινόςGreek
• ĉielekvatoroEsperanto
• taivaanekvaattoriFinnish
• ecuator cerescRomanian
• небе́сный эква́торRussian

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"celestial equator." Definitions.net. STANDS4 LTD, 2026. Web. 9 Feb. 2026. <https://www.definitions.net/definition/celestial+equator>.

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