1. celestial sphere - Noun
2. Celestial sphere - Proper noun
the apparent surface of the imaginary sphere on which celestial bodies appear to be projected
Source: WordNetAn analogous concept applies to other planets: a planet's celestial poles are the points in the sky where the projection of the planet's axis of rotation intersects the celestial sphere. Source: Internet
Declinations with magnitudes greater than 90° do not occur, because the poles are the northernmost and southernmost points of the celestial sphere. Source: Internet
Ecliptic coordinate systems main The idea of dividing the celestial sphere into constellations, understood as areas surrounding asterisms, is early modern. Source: Internet
Crux is exactly opposite to Cassiopeia on the celestial sphere, and therefore it cannot appear in the sky with the latter at the same time. Source: Internet
Effects of precession Right ascension (blue) and declination (green) as seen from outside the celestial sphere main The Earth's axis rotates slowly westward about the poles of the ecliptic, completing one circuit in about 26,000 years. Source: Internet
Concepts in Western astrology main * The native is the subject of the event (a birth, for example) being charted at a particular time and place, and is considered to be at the centre of the celestial sphere. Source: Internet