unstable orbit
101Antarctica — /ant ahrk ti keuh, ahr ti /, n. the continent surrounding the South Pole: almost entirely covered by an ice sheet. ab. 5,000,000 sq. mi. (12,950,000 sq. km). Also called Antarctic Continent. * * * Antarctica Introduction Antarctica Background:… …
102electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …
103nebula — nebular, adj. /neb yeuh leuh/, n., pl. nebulae / lee , luy /, nebulas. 1. Astron. a. Also called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula …
104Comet Shoemaker-Levy 9 — Shoemaker Levy redirects here. For other Shoemaker Levy comets see List of periodic comets. Infobox Comet name=SL9 (Shoemaker Levy) caption=Image of Comet Shoemaker Levy 9 fragments (total: 21), taken on May 17, 1994 discoverer= Carolyn Shoemaker …
105Space exploration — is the use of astronomy and space technology to explore outer space. [cite web | url = http://adc.gsfc.nasa.gov/adc/education/space ex/exploration.html | title = How Space is Explored | publisher = NASA] Physical exploration of space is conducted …
106Natural satellite — Moons redirects here. For other uses, see Moons (disambiguation). Two moons: Saturn s moon Dione occults Enceladus A natural satellite or moon is a celestial body that orbits a planet or smaller body, which is called its primary …
107Attractor — For other uses, see Attractor (disambiguation). Visual representation of a strange attractor An attractor is a set towards which a dynamical system evolves over time. That is, points that get close enough to the attractor remain close even if… …
108Muon-catalyzed fusion — This article refers to the original use of the term cold fusion. For the controversial experiments known as cold fusion, see Cold fusion. For other uses, see Cold Fusion (disambiguation). Muon catalyzed fusion (μCF) is a process allowing nuclear… …
109Lunar space elevator — A lunar space elevator (also called a moonstalk) is a proposed cable running from the surface of the Moon into space.It is similar in concept to the better known Earth space elevator idea (a cable suspended above Earth, with its center of gravity …
110Competitive Lotka–Volterra equations — The competitive Lotka–Volterra equations are a simple model of the population dynamics of species competing for some common resource. They can be further generalised to include trophic interactions. Contents 1 Overview 1.1 Two species 1.2 N… …
