ellipticity
41Francis Baily — Infobox Scientist name = Francis Baily box width = image width = 150px caption = Royal Astronomical Society photo birth date = 28 April 1774 birth place = Newbury in Berkshire death date = 30 August 1844 death place = London residence =… …
42Alexis Clairaut — Infobox Scientist name = Alexis Claude de Clairault box width = image width =250px caption = Alexis Claude de Clairault birth date = May 7, 1713 birth place = death date = May 17, 1765 death place = residence = citizenship = nationality = French… …
43Figure of the Earth — An oblate spheroid Geodesy …
44Full moon cycle — The full moon cycle is a cycle of about 14 lunations over which full moons vary in apparent size and age (time since new moon). The sequence is *Full moon big (perigee at full moon) *Full moon young (perigee at first quarter) *Full moon small… …
45Axion — Infobox Particle name = Axion status = Hypothetical interaction = Gravity, Electromagnetic theorized = 1977, Peccei and Quinn mass = 10−6 to 1 eV/c2 electric charge = 0 spin = 0The axion is a hypothetical elementary particle postulated by Peccei… …
46Magneto-optical drive — A Magneto optical disc and the numerous rectangles on its surface. A magneto optical drive is a kind of optical disc drive capable of writing and rewriting data upon a magneto optical disc. Both 130 mm (5.25 in) and 90 mm… …
47Haversine formula — The haversine formula is an equation important in navigation, giving great circle distances between two points on a sphere from their longitudes and latitudes. It is a special case of a more general formula in spherical trigonometry, the law of… …
48Reference 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… …
49Moment magnitude scale — Part of a series on earthquakes Types Foreshock • Aftershock • Blind thrust Doublet • Interplate • …
50GRS 80 — GRS 80, or Geodetic Reference System 1980, is a geodetic reference system consisting of a global reference ellipsoid and a gravity field model.GeodesyGeodesy, also called geodetics, is the scientific discipline that deals with the measurement and …
