oblateness
31Earth radius — The Earth s shape, like that of all major planets, approximates a sphere. A true sphere has a unique radius, but on Earth the distance from the mean sea level at each point on the surface to the center (the radius of the Earth at a point on the… …
32Edward Sabine — Infobox Scientist name = PAGENAME box width = image size =150px caption = PAGENAME birth date = October 14, 1788 birth place = Dublin death date = May 26, 1883 death place = East Sheen residence = citizenship = nationality = Irish ethnicity =… …
33Celestia — Infobox Software caption = Celestia displaying Jupiter, Europa and Io developer = Chris Laurel, Celestia developers released = 2001 latest release version = 1.5.1 latest release date = 24 April 2008 latest preview version = latest preview date =… …
34Dawn (spacecraft) — Dawn Artist s concept of Dawn with Vesta (left) Ceres (right) (the proximity of Vesta to Ceres is not to scale.) Operator NASA Major contractors Orbital Sciences, JPL, UCLA …
35Frame-dragging — Albert Einstein s theory of general relativity predicts that rotating bodies drag spacetime around themselves in a phenomenon referred to as frame dragging. The rotational frame dragging effect was first derived from the theory of general… …
36Molniya orbit — For other uses, see Molniya (disambiguation). Figure 1: The Molniya orbit. Usually the period from perigee + 2 hours to perigee + 10 hours is used to transmit to the northern hemisphere Molniya orbit is a type of highly elliptical orbit with an… …
37Oblate spheroid — An oblate spheroid An oblate spheroid is a rotationally symmetric ellipsoid having a polar axis shorter than the diameter of the equatorial circle whose plane bisects it.[1] Oblate spheroids stand in contrast to prolate spheroids. It can be… …
38Transit of Earth from Mars — A transit of Earth across the Sun as seen from Mars takes place when the planet Earth passes directly between the Sun and Mars, obscuring a small part of the Sun s disc for an observer on Mars. During a transit, Earth could be seen from Mars as a …
39(137924) 2000 BD19 — Infobox Planet | discovery=yes | physical characteristics = yes | bgcolour=#FFFFC0 name=(137924) 2000 BD19 discoverer=LINEAR discovered=January 26, 2000 alt names= none mp category=Aten asteroid, Mercury crosser asteroid, Venus crosser asteroid,… …
40Laplace plane — The Laplace plane, named after Pierre Simon Laplace, is defined as the mean plane occupied by the orbit of a satellite during a precession cycle. In other words, the plane normal to the orbital precession pole of the satellite.It is used to… …
