Of+the+equinoctial
101Precession (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… …
102year — /year/, n. 1. a period of 365 or 366 days, in the Gregorian calendar, divided into 12 calendar months, now reckoned as beginning Jan. 1 and ending Dec. 31 (calendar year or civil year). Cf. common year, leap year. 2. a period of approximately the …
103Equator — E*qua tor, n. [L. aequator one who equalizes: cf. F. [ e]quateur equator. See {Equate}.] 1. (Geog.) The imaginary great circle on the earth s surface, everywhere equally distant from the two poles, and dividing the earth s surface into two… …
104Equator of a planet — Equator E*qua tor, n. [L. aequator one who equalizes: cf. F. [ e]quateur equator. See {Equate}.] 1. (Geog.) The imaginary great circle on the earth s surface, everywhere equally distant from the two poles, and dividing the earth s surface into… …
105Magnetic equator — Equator E*qua tor, n. [L. aequator one who equalizes: cf. F. [ e]quateur equator. See {Equate}.] 1. (Geog.) The imaginary great circle on the earth s surface, everywhere equally distant from the two poles, and dividing the earth s surface into… …
106equinox — i. One of the two points of intersection of the ecliptic and the celestial equators, occupied by the sun when its declination is 0°. Also called an equinoctial point. That point occupied on or about March 21, when the sun’s declination changes… …
107Friedrich Wilhelm Heinrich Alexander Freiherr von Humboldt — Alexander von Humboldt Gemälde von Joseph Stieler, 1843 Friedrich Wilhelm Heinrich Alexander von Humboldt (* 14. September 1769 in Berlin; † 6. Mai 1859 ebenda) war ein deutscher Naturforscher von Weltgeltung und Mitbegründer der Geographie als… …
108Friedrich Wilhelm Heinrich Alexander von Humboldt — Alexander von Humboldt Gemälde von Joseph Stieler, 1843 Friedrich Wilhelm Heinrich Alexander von Humboldt (* 14. September 1769 in Berlin; † 6. Mai 1859 ebenda) war ein deutscher Naturforscher von Weltgeltung und Mitbegründer der Geographie als… …
109great year — noun time required for one complete cycle of the precession of the equinoxes, about 25,800 years • Syn: ↑Platonic year • Hypernyms: ↑time period, ↑period of time, ↑period * * * noun Etymology: Middle Eng …
110celestial coordinates — Two coordinates on the surface of the celestial sphere used to determine the position of a celestial body. Two sets of celestial coordinates are in common use: the equinoctial system, in which the coordinates are a declination and an hour circle …
