Where do these comets

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• Comets in fiction — Comets have, through the centuries, appeared in numerous works of fiction. In earliest times they were seen as portents, either of disaster or of some great historical change. As knowledge of comets increased, comets came to be imagined not just… …   Wikipedia

• Bill Haley & His Comets — Infobox musical artist Name = Bill Haley His Comets Img capt = The original members of Bill Haley and His Comets, c. 1952. Left to right: Marshall Lytle, Johnny Grande, Bill Haley, Billy Williamson. Background = group or band Birth name = Alias …   Wikipedia

• Scooby-Doo, Where Are You! — The first season opening title from Scooby Doo, Where Are You! Genre Mystery Adventure Comedy …   Wikipedia

• comet — cometary /kom i ter ee/, cometic /keuh met ik/, cometical, adj. cometlike, adj. /kom it/, n. Astron. a celestial body moving about the sun, usually in a highly eccentric orbit, consisting of a central mass surrounded by an envelope of dust and… …   Universalium

• Alpha Centauri — This article is about α Centauri . For a Centauri , see V761 Centauri. For A Centauri , see A Centauri. For other uses, see Alpha Centauri (disambiguation). Alpha Centauri A[1]/B[2] …   Wikipedia

• Impact event — Artist s impression of a major impact event. The collision between Earth and an asteroid a few kilometers in diameter may release as much energy as several million nuclear weapons detonating simultaneously. An impact event is the collision of a… …   Wikipedia

• Oort cloud — /awrt, ohrt/, Astron. a region of the solar system far beyond the orbit of Pluto in which billions of comets move in nearly circular orbits unless one is pulled into a highly eccentric elliptical orbit by a passing star. [1975 80; after Dutch… …   Universalium

• Comet nucleus — The nucleus of Comet Tempel 1. The nucleus is the solid, central part of a comet, popularly termed a dirty snowball. A cometary nucleus is composed of rock, dust, and frozen gases. When heated by the Sun, the gases sublimate and produce an… …   Wikipedia

• Dinosaur — For other uses, see Dinosaur (disambiguation). Dinosaurs Temporal range: Late Triassic–Late Cretaceous, 231.4–65.5 Ma …   Wikipedia

• Origin of water on Earth — Water covers about 70% of the Earth s surface The question of the origin of water on Earth, or the question of why there is clearly more water on the Earth than on the other planets of the Solar System, has not been clarified. There are several… …   Wikipedia

• meteor shower — Astron. the profusion of meteors observed when the earth passes through a meteor swarm. Also, meteoric shower. [1875 80] * * * Entry into Earth s atmosphere of multiple meteoroids (see meteor), traveling in parallel paths, usually spread over… …   Universalium