planetocentric
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Planetocentric longitude — Ls (pronounced el sub ess ) is the solar longitude angle from vernal equinox. Introduction Ls is the planetocentric longitude of Sun. See also * Longitude on bodies other than Earth * Timekeeping on Mars … Wikipedia
planetocentric — … Useful english dictionary
Longitude — For Dava Sobel s book about John Harrison, see Longitude (book). For the adaptation of Sobel s book, see Longitude (TV series). Map of Earth Longitude (λ) Lines of longitude appear vertical with varying curvature in this projection, but are… … 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
Viking 1 — Infobox Spacecraft Name = Viking 1 Orbiter Caption = Viking orbiter Organization = NASA Major Contractors = Mission Type = Orbiter Satellite Of = Mars Orbital Insertion Date = June 19 1976 Launch = August 20 1975 Launch Vehicle = Titan… … Wikipedia
List of mountains on Mars — This is a list of all named mountains on Mars.* Mons refers to a large, isolated, mountain. * Montes is the plural of mons and refers a mountain range. * Tholus refers to a small dome shaped mountain. * Tholi is the plural of tholus and refers to … Wikipedia
Timekeeping on Mars — Various schemes have been used or proposed to keep track of time and date on the planet Mars independently of Earth time and calendars. Mars has an axial tilt and a rotation period similar to those of Earth. Thus it experiences seasons of spring … Wikipedia
Georeactor — The georeactor is a proposal by J. Marvin Herndon that a nuclear fission reactor may exist and operate at the Earth s core and serves as the energy source for the geomagnetic field. Herndon had earlier proposed the existence of fission reactors… … Wikipedia
Stretched exponential function — Figure 1. Illustration of a stretched exponential fit (with β=0.52) to an empirical master curve. For comparison, a least squares single and a double exponential fit are also shown. The data are rotational anisotropy of anthracene in… … Wikipedia
J. Marvin Herndon — (b. 1944) is an American interdisciplinary scientist, who earned his BA degree in physics in 1970 from the University of California, San Diego and his Ph.D. degree in nuclear chemistry in 1974 from Texas A M University. For three years, J. Marvin … Wikipedia
