obliquity of the ecliptic
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obliquity of the ecliptic — The angle between the plane of the equinoctial and that of the ecliptic. Its value is approximately 231/2° … Aviation dictionary
Ecliptic — The ecliptic is the apparent path that the Sun traces out in the sky during the year. As it appears to move in the sky in relation to the stars, the apparent path aligns with the planets throughout the course of the year. More accurately, it is… … Wikipedia
Obliquity — Ob*liq ui*ty, n.; pl. {Obliquities}. [L. obliquitas: cf. F. obliquit[ e].] 1. The condition of being oblique; deviation from a right line; deviation from parallelism or perpendicularity; the amount of such deviation; divergence; as, the obliquity … The Collaborative International Dictionary of English
obliquity — [ə blik′wə tē] n. pl. obliquities [ME obliquitee < L obliquitas] 1. the state or quality of being oblique 2. an oblique statement, action, etc. 3. a turning aside from moral conduct or sound thinking 4. Astron. the angle between the planes of… … English World dictionary
obliquity — obliquitous, adj. /euh blik wi tee, oh blik /, n., pl. obliquities. 1. the state of being oblique. 2. divergence from moral conduct, rectitude, etc.; immorality, dishonesty, or the like. 3. an instance of such divergence. 4. mental perversity. 5 … Universalium
obliquity — /əˈblɪkwəti/ (say uh blikwuhtee) noun (plural obliquities) 1. the state of being oblique. 2. divergence from moral rectitude. 3. a moral delinquency. 4. mental perversity. 5. an instance of mental perversity. 6. inclination, or degree of… …
obliquity — noun (plural ties) Date: 15th century 1. deviation from moral rectitude or sound thinking 2. a. deviation from parallelism or perpendicularity; also the amount of such deviation b. the angle between the planes of the earth s equator and orbit… … New Collegiate Dictionary
equinoxes, precession of the — Motion of the points where the Sun crosses the celestial equator, caused by precession of Earth s axis. Hipparchus noticed that the stars positions were shifted consistently from earlier measures, indicating that Earth, not the stars, was moving … Universalium
Orbit of the Moon — Not to be confused with Lunar orbit in the sense of a selenocentric orbit, that is, an orbit around the Moon The Moon completes its orbit around the Earth in approximately 27.3 days (a sidereal month). The Earth and Moon orbit about their… … Wikipedia
mean obliquity — noun : the average angle over a long period of time between the plane of the equator of the earth or other planet and the plane of the ecliptic … Useful english dictionary
