navigation by means of observations made of the apparent position of heavenly bodies.
navigation by observation of the positions of the stars Also called astronavigation
Navigation of a ship or aircraft based on the observed positions of celestial bodies. See more at altazimuth coordinate system.
each of the two points in which the extended axis of the earth cuts the celestial sphere and about which the stars seem to revolve. noun either of the two points at which the earth’s axis, extended to infinity, would intersect the celestial sphere Sometimes shortened to pole celestial pole Either of the two points […]
the imaginary spherical shell formed by the sky, usually represented as an infinite sphere, the center of which is a given observer’s position. noun an imaginary sphere of infinitely large radius enclosing the universe so that all celestial bodies appear to be projected onto its surface celestial sphere An imaginary sphere with Earth at its […]
a transparent celluloid sheet on which a character, scene, etc., is drawn or painted and which constitutes one frame in the filming of an animated cartoon: may be overlapped for change of background or foreground. Historical Examples noun short for celluloid (sense 2b), celluloid (sense 2c) n. “celluloid sheet for an animated cartoon,” from celluloid; […]
cincture (defs 1, 2).