major equatorial axis

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• Equatorial — has different meanings:* In geography it relates to the equator of the Earth. * In meteorology, an Equatorial climate is the type of climate experienced near the equator. * In geometry, it refers to the ring shaped outer boundary of the cross… …   Wikipedia

• Axis powers — Infobox Former International Organization conventional long name = Axis Powerscommon name = Axis Powers noautocat = yes status = Military alliance continent = Europe era = World War II eventhhhh year start = 1940 date start = September 27, 1940… …   Wikipedia

• Equatorial bulge — An equatorial bulge is a bulge which a planet may have around its equator, distorting it into an oblate spheroid. The Earth has an equatorial bulge of 42.72 km (26.5 miles) due to its rotation: its diameter measured across the equatorial plane… …   Wikipedia

• Major depressive disorder — For other depressive disorders, see Mood disorder. Major Depressive Disorder Classification and external resources …   Wikipedia

• Semi-major axis — The semi major axis of an ellipse The major axis of an ellipse is its longest diameter, a line that runs through the centre and both foci, its ends being at the widest points of the shape. The semi major axis is one half of the major axis, and… …   Wikipedia

• Semi-minor axis — The semi minor axis of an ellipse In geometry, the semi minor axis (also semiminor axis) is a line segment associated with most conic sections (that is, with ellipses and hyperbolas). One end of the segment is the center of the conic section, and …   Wikipedia

• Near-equatorial orbit — A near equatorial orbit is an orbit that lies close to the equatorial plane of the object orbited. This orbit allows for rapid revisit times (for a single orbiting spacecraft) of near equatorial ground sites.[citation needed] See also List of… …   Wikipedia

• celestial mechanics — the branch of astronomy that deals with the application of the laws of dynamics and Newton s law of gravitation to the motions of heavenly bodies. [1815 25] * * * Branch of astronomy that deals with the mathematical theory of the motions of… …   Universalium

• geoid — geoidal, adj. /jee oyd/, n. 1. an imaginary surface that coincides with mean sea level in the ocean and its extension through the continents. 2. the geometric figure formed by this surface, an ellipsoid flattened at the poles. [1880 85; < Gk… …   Universalium

• Natural satellite — Moons redirects here. For other uses, see Moons (disambiguation). Two moons: Saturn s moon Dione occults Enceladus A natural satellite or moon is a celestial body that orbits a planet or smaller body, which is called its primary …   Wikipedia

• Reference ellipsoid — In geodesy, a reference ellipsoid is a mathematically defined surface that approximates the geoid, the truer figure of the Earth, or other planetary body.Because of their relative simplicity, reference ellipsoids are used as a preferred surface… …   Wikipedia