celestial sphere

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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

celes′tial sphere′


n.
the imaginary, infinite sphere formed by the sky, the center of which is a given observer's position.
[1875–80]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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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.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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References in periodicals archive ?
O(2), O(3), N(3) and N(4) are approximately coplanar for Cu(1) to form the equatorial plane. N(2) and N(1) occupy axial sites for Cu(1) with bond angle N(2)-Cu(1)-N(1) being 177.37(15)Adeg.
"As they reach the core surface, the waves focus their energy towards the equatorial plane and along lines of strong magnetic flux, creating sharp interannual changes in core flow and producing geomagnetic jerks through the induced variations in magnetic field acceleration."
Key statement: A tread and tire for a multipurpose agricultural machine, that improves field traction while ensuring a satisfactory compromise with wear under engine torque and vibratory comfort on the road having a tread having a plurality of lugs distributed in a first row extending axially from a first axial end of the tread and in a second row extending axially from a second axial end of the tread, the second row differing from the first row by a symmetry relative to the equatorial plane of the tire followed by a rotation about the rotation axis of the tire, each row having an alternation of long lugs and of short lugs.
The ring appears to lie in Haumea's equatorial plane, which is shared by the larger, outer moon Hi'iaka.
Determining the axial tilt of planets or the angle between the planet's equatorial plane and orbital plane proves difficult to assess accurately, given the limitations of the observational points of view on Earth.
Chromosomes derived from the egg were arranged along the equatorial plane of the meiotic spindle.
Scientists will tell you the 55th parallel north is a circle of latitude that is 55 degrees north of the Earth's equatorial plane.
equatorial plane, and dive into the space between Saturn and it's
Relative to the celestial equator, it passes as far north as the constellation of Cassiopeia and as far south as the constellation of Crux, indicating the high inclination of Earth's equatorial plane and the plane of the ecliptic, relative to the Galactic plane.
The satellite will be launched into a sub Geosynchronous Transfer Orbit (sub GTO) with a 284 km perigee (nearest point to Earth) and 20,652 kms of apogee (farthest point from the Earth) with an inclination of 19.2 degree to equatorial plane. ( ANI )
The direction is aligned with the ecliptic plane (the plane of the orbit of the planets around the sun), and with the equinoxes (the equatorial plane of supposedly insignificant Earth).