near-circular orbit
81Planetary habitability — is the measure of a planet s or a natural satellite s potential to develop and sustain life. As the existence of life beyond Earth is currently uncertain, planetary habitability is largely an extrapolation of conditions on Earth and the… …
82Modified Newtonian dynamics — MOND redirects here. For other uses, see Mond. In physics, Modified Newtonian dynamics (MOND) is a hypothesis that proposes a modification of Newton s law of gravity to explain the galaxy rotation problem. When the uniform velocity of rotation of …
8390482 Orcus — Discovery[1] Discovered by M. Brown, C. Trujillo, D …
84Colonization of the Moon — Lunar outpost redirects here. For NASA s plan to construct an outpost between 2012 and 2024, see Lunar outpost (NASA). Moonbase redirects here. For other uses, see Moonbase (disambiguation). 1986 artist concept The colonization of the Moon is the …
85Astrionics — is the science and technology of the development and application of electronic systems, sub systems, and components used in spacecraft. The electronic systems on board a spacecraft include attitude determination and control, communications,… …
86Black hole — For other uses, see Black hole (disambiguation). Simulated view of a black hole (center) in front of the Large Magellanic Cloud. Note the gravitat …
87Correspondence principle — This article discusses quantum theory and relativity. For other uses, see Correspondence principle (disambiguation). In physics, the correspondence principle states that the behavior of systems described by the theory of quantum mechanics (or by… …
88Orbital elements — are the parameters required to uniquely identify a specific orbit. In celestial mechanics these elements are generally considered in classical two body systems, where a Kepler orbit is used (derived from Newton s laws of motion and Newton s law… …
89Orbital period — For the music album, see Orbital Period (album). The orbital period is the time taken for a given object to make one complete orbit about another object. When mentioned without further qualification in astronomy this refers to the sidereal period …
90Constellation program — logo Constellation Program (abbreviated CxP) is a human spaceflight program within NASA, the space agency of the United States. The stated goals of the program were to gain significant experience in operating away from Earth s environment,… …
