celestial sphere

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Related to Celestial hemisphere: Celestial coordinate system
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celestial sphere

celestial sphere

n.
An imaginary sphere of infinite extent with the earth at its center and on which the stars, planets, and other heavenly bodies appear to be located.

celestial sphere

n
(Astronomy) an imaginary sphere of infinitely large radius enclosing the universe so that all celestial bodies appear to be projected onto its surface

celes′tial sphere′


n.
the imaginary, infinite sphere formed by the sky, the center of which is a given observer's position.
[1875–80]
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celestial sphere

celestial sphere

An imaginary sphere with Earth at its center. The stars, planets, sun, moon, and other heavenly bodies appear to be located on this sphere.

celestial sphere

An imaginary sphere of infinite radius concentric with the Earth, on which all celestial bodies except the Earth are imagined to be projected.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.celestial sphere - the apparent surface of the imaginary sphere on which celestial bodies appear to be projectedcelestial sphere - the apparent surface of the imaginary sphere on which celestial bodies appear to be projected
apex of the sun's way, solar apex, apex - the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars
celestial point - a point in the heavens (on the celestial sphere)
nadir - the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected
surface - the extended two-dimensional outer boundary of a three-dimensional object; "they skimmed over the surface of the water"; "a brush small enough to clean every dental surface"; "the sun has no distinct surface"
zenith - the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected
zodiac - a belt-shaped region in the heavens on either side to the ecliptic; divided into 12 constellations or signs for astrological purposes
Translations
References in periodicals archive ?
In the northern celestial hemisphere the Sumerians placed a celestial Plow, Apin, which apparently consisted of Gamma Andromedae plus our classical Triangulum, with the plow's narrow tip at Alpha Trianguli.
The variation of histogram shape shows not only the extent of proximity of the Sun or a planet to the celestial equator but also their location in one or another celestial hemisphere.
Which of these constellations are part of the Northern Celestial Hemisphere and which the Southern: Aries, Aquarius, Cancer, Libra, Gemini, Pisces, Mensa, Sagittarius, Taurus and Virgo.
Launched in 1977, Voyager 2 follows in the footsteps of Voyager 1, its sister craft, which headed toward the fringes of the solar system in the opposite direction, the northern celestial hemisphere, and passed through a single termination shock in 2004.
Launched in 1977, Voyager 2 follows in the footsteps of its sister craft, Voyager 1, which headed toward the fringes of the solar system in the opposite direction, the northern celestial hemisphere, and passed through a single termination shock in 2004.
Autumnal equinox occurs on September 23 as the sun moves into the southern celestial hemisphere bringing equal hours of day and night.
Secondly, thanks to Empedocles' own words as preserved for us by Plutarch, we know that he himself explained night not as some celestial hemisphere but, instead, as the direct result of the earth interposing itself between the observer and the rays of the sun; he was clearly just as familiar with this - to us correct explanation of night as he was aware of the fact that solar eclipses are caused by the moon interposing itself between the sun and the observer on earth.
Covering nearly a quarter of the celestial hemisphere, the Sloan Digital Sky Survey over the past 5 years has mapped the location and brightness of several hundred million objects.
On January 28th Uranus crosses into the north celestial hemisphere for a 42-year stay.
The Sloan Digital Sky Survey, which began taking preliminary data a year ago and continues through 2005, will ultimately image and map the locations of millions of objects across a huge stretch of the northern celestial hemisphere (SN: 1/23/99, p.
Jupiter crosses into the north celestial hemisphere on February 5th, and late in the month it leaves Pisces for a brief journey through the northwest corner of Cetus.