ideal instantaneous orbit
31Russia — /rush euh/, n. 1. Also called Russian Empire. Russian, Rossiya. a former empire in E Europe and N and W Asia: overthrown by the Russian Revolution 1917. Cap.: St. Petersburg (1703 1917). 2. See Union of Soviet Socialist Republics. 3. See Russian… …
32Charles Lindbergh — This article is about the 20th Century aviator. For other uses, see Charles Lindbergh (disambiguation). Charles Lindbergh Charles Lindbergh, photo by Harris Ewing Born February 4, 1902(1902 …
33navigation — navigational, adj. /nav i gay sheuhn/, n. 1. the act or process of navigating. 2. the art or science of plotting, ascertaining, or directing the course of a ship, aircraft, or guided missile. [1520 30; < L navigation (s. of navigatio) a voyage.… …
34History of mathematics — A proof from Euclid s Elements, widely considered the most influential textbook of all time.[1] …
35quantum mechanics — quantum mechanical, adj. Physics. a theory of the mechanics of atoms, molecules, and other physical systems that are subject to the uncertainty principle. Abbr.: QM Cf. nonrelativistic quantum mechanics, relativistic quantum mechanics. [1920 25]… …
36Sedimentary rock — Middle Triassic marginal marine sequence of siltstones (below) and limestones (above), Virgin Formation, southwestern Utah, USA Sedimentary rock are types of rock that are formed by the deposition of material at the Earth s surface and within… …
37Quantum mechanics — For a generally accessible and less technical introduction to the topic, see Introduction to quantum mechanics. Quantum mechanics …
38Hainish Cycle — The Hainish Cycle is the setting for a number of science fiction novels and stories of Ursula K. Le Guin. Most of them are not set on Hain, but have it as a rather distant background. People from Hain are often present but mostly as secondary… …
39Reiki — This article is about the energy therapy. For the Japanese era name, see Reiki (era). For uses of the homophone raki , see Raki (disambiguation). Energy medicine …
40Dominion War — Part of Star Trek: Deep Space Nine …
