celestial
121celestial coordinates — Set of numbers used to pinpoint the position in the sky (see celestial sphere) of a celestial object. Coordinate systems used include the horizon system (altitude and azimuth), galactic coordinates, the ecliptic system (measured relative to the… …
122celestial object — noun A natural object which is located outside of Earths atmosphere, such as the Moon, the Sun, an asteroid, planet, or star. It is only 100 feet across but it now has the honor of being the solar systems fastest spinnin …
123celestial navigation — n. astronavigation, navigation of a ship or aircraft according to the position of celestial objects; navigation in space between celestial bodies …
124celestial navigations — n. astronavigation, navigation of a ship or aircraft according to the position of celestial objects; navigation in space between celestial bodies …
125celestial altitude — The vertical angle between the celestial horizon of an observer and a line that joins a given celestial body with the center of the earth …
126celestial equator — The great circle of the celestial sphere, in which all points are 90° from the poles. It is the plane of the earth’s equator projected onto the celestial sphere. Also called equinoctial …
127celestial longitude — The celestial longitude of a body is the arc of the ecliptic contained between the first point of Aries and the secondary ecliptic through that body measured eastward from Aries. It is the angular distance along the ecliptic from the vernal… …
128celestial poles — The point on the celestial sphere where the earth’s axis, if projected, would intersect the celestial sphere …
