Planetary precession
Precession Pre*ces"sion, n. [L. praecedere, praecessum, to go before: cf. F. pr['e]cession. See {Precede}.] The act of going before, or forward. [1913 Webster]

{Lunisolar precession}. (Astron.) See under {Lunisolar}.

{Planetary precession}, that part of the precession of the equinoxes which depends on the action of the planets alone.

{Precession of the equinoxes} (Astron.), the slow backward motion of the equinoctial points along the ecliptic, at the rate of 50.2[sec] annually, caused by the action of the sun, moon, and planets, upon the protuberant matter about the earth's equator, in connection with its diurnal rotation; -- so called because either equinox, owing to its westerly motion, comes to the meridian sooner each day than the point it would have occupied without the motion of precession, and thus precedes that point continually with reference to the time of transit and motion. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • planetary precession — Astron. the small component of the precession of the equinoxes contributed by the motion of the ecliptic, the change in orientation of the plane of the earth s orbit being produced by the gravitational attraction of the planets. [1860 65] * * * …   Universalium

  • planetary precession — Astron. the small component of the precession of the equinoxes contributed by the motion of the ecliptic, the change in orientation of the plane of the earth s orbit being produced by the gravitational attraction of the planets. [1860 65] …   Useful english dictionary

  • Precession — Pre*ces sion, n. [L. praecedere, praecessum, to go before: cf. F. pr[ e]cession. See {Precede}.] The act of going before, or forward. [1913 Webster] {Lunisolar precession}. (Astron.) See under {Lunisolar}. {Planetary precession}, that part of the …   The Collaborative International Dictionary of English

  • Precession of the equinoxes — Precession Pre*ces sion, n. [L. praecedere, praecessum, to go before: cf. F. pr[ e]cession. See {Precede}.] The act of going before, or forward. [1913 Webster] {Lunisolar precession}. (Astron.) See under {Lunisolar}. {Planetary precession}, that… …   The Collaborative International Dictionary of English

  • Precession (astronomy) — In astronomy, precession refers to the movement of the rotational axis of a body, such as a planet, with respect to inertial space. In particular, it refers to the precession of the Earth s rotational axis, also called the precession of the… …   Wikipedia

  • Planetary habitability — is the measure of a planet s or a natural satellite s potential to develop and sustain life. As the existence of life beyond Earth is currently uncertain, planetary habitability is largely an extrapolation of conditions on Earth and the… …   Wikipedia

  • Planetary science — Planetary science, also known as planetology and closely related to planetary astronomy, is the science of planets, or planetary systems, and the solar system. Incorporating an interdisciplinary approach, planetary science draws from diverse… …   Wikipedia

  • Lunisolar precession — Precession Pre*ces sion, n. [L. praecedere, praecessum, to go before: cf. F. pr[ e]cession. See {Precede}.] The act of going before, or forward. [1913 Webster] {Lunisolar precession}. (Astron.) See under {Lunisolar}. {Planetary precession}, that… …   The Collaborative International Dictionary of English

  • general precession — Astron. the precession that results from both lunisolar precession and planetary precession; precession of the equinoxes. * * * …   Universalium

  • general precession — Astron. the precession that results from both lunisolar precession and planetary precession; precession of the equinoxes …   Useful english dictionary

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