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Topic: Asteroid deflection strategies

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	Asteroid deflection strategies - Wikipedia, the free encyclopedia
		Asteroid deflection strategies are methods by which near-Earth objects could be diverted, preventing potentially catastrophic impact events.
		A large asteroid could be blown apart by a nuclear device detonated in its core only to have gravity draw the asteroid back together, essentially nullifying the effect of the explosion.
		Because asteroids are discrete, one from the other, claiming a history of previous proximity of one asteroid as being in objective context with future impact of another asteroid is fantasy, and abusive to accurate perception of reality.
	en.wikipedia.org /wiki/Asteroid_deflection_strategies (3767 words)

	Kids.Net.Au - Encyclopedia > Asteroid
		Asteroids composed largely of ice are known as comets.
		A large group of asteroids have orbits between the orbits of Mars and Jupiter, roughly 2 to 4 AU, in a region known as the Main belt.
		Asteroids are classified into spectral types by their optical spectrum, which corresponds to the composition of the asteroid's surface material.
	www.kids.net.au /encyclopedia-wiki/as/Asteroid (1066 words)

	asteroid (Site not responding. Last check: 2007-10-23)
		Asteroids are commonly classified into groups based on the characteristics of their orbits and on the details of the spectrum of sunlight they reflect.
		The first true asteroid to be photographed in close-up was 951 Gaspra in 1991, followed in 1993 by 243 Ida and its moon Dactyl, all of which were imaged by the Galileo probe en route to Jupiter.
		Stories of asteroid mining became more and more numerous since the late 1940s, with the next logical step being depictions of a society on terraformed asteroids —in some cases dug under the surface, in others having dome colonies and in still others provided with an atmosphere which is kept in place by an artificial gravity.
	encyclopedia.vestigatio.com /asteroid (3339 words)

	Asteroid - Wikipedia, the free encyclopedia
		Asteroid, minor planet, and planetoid are synomyms, and are used to indicate a diverse group of small celestial bodies that drift in the solar system in orbit around the Sun.
		It is thought that asteroids are remnants of the protoplanetary disc, and in this region the incorporation of protoplanetary remnants into the planets was prevented by large gravitational perturbations induced by Jupiter during the formative period of the solar system.
		Moreover, depictions of the Asteroid Belt as The New Frontier clearly draw (sometimes explicitly) on the considerable literature of the Nineteenth-Century Frontier and the Wild West.
	en.wikipedia.org /wiki/Asteroids (3684 words)

	Near-Earth asteroid
		Near-Earth asteroids (NEAs) are asteroids whose orbit intersects Earth's orbit and which may therefore pose a collision danger, as well as being most easily accessible for spacecraft from Earth.
		The general acceptance of the Alvarez hypothesis, explaining the Cretaceous-Tertiary extinction event as the result of a large asteroid or comet impact event, has raised the awareness of the possibility of future Earth impacts with asteroids that cross the Earth's orbit.
		Asteroid 1950 DA was lost after its discovery in 1950 since not enough observations were made to allow plotting its orbit, and then rediscovered on December 31 2000.
	www.ebroadcast.com.au /lookup/encyclopedia/ne/Near-Earth_asteroid.html (1281 words)

	Asteroid Info - Bored Net - Boredom (Site not responding. Last check: 2007-10-23)
		The vast majority of the asteroids are within the asteroid belt, with elliptical orbits between that of Mars and Jupiter.
		These are generally supposed to be asteroids or comets that were ejected from their original orbits.
		Until 1998, asteroids were discovered by a four-step process.
	www.borednet.com /e/n/encyclopedia/a/as/asteroid.html (1232 words)

	Near-Earth asteroid - Wikipedia, the free encyclopedia
		The threat of an Earth impact was emphasized by the collision of the comet Shoemaker-Levy 9 with Jupiter on July 16, 1994.
		Asteroid (29075) 1950 DA was lost after its discovery in 1950 since not enough observations were made to allow plotting its orbit, and then rediscovered on December 31, 2000.
		However, it is becoming increasingly obvious that many asteroids are "flying rubble piles" that are loosely glued together, and a nuclear detonation might just break up the object without adjusting its course.
	en.wikipedia.org /wiki/Near_earth_asteroid (1279 words)

	Talk:Asteroid deflection strategies - Wikipedia, the free encyclopedia
		Asteroid deflection strategies was the Article Improvement Drive for the week starting on January 22, 2006.
		Some of the links, that I found, perhaps ought to be moved from this article on deflection strategies, to one of the related articles, that focus more on what the problems are that call for deflection strategies.
		By using gravity to pull the asteroid, this can save us from near earth objects that have the consistency of piles of rubble, which if detonated just changes distribution of the rubble still headed towards us, or high rotation that is difficult to mount a pusher on.
	en.wikipedia.org /wiki/Talk:Asteroid_deflection_strategies (2582 words)

	Asteroid
		Asteroid: A rocky or metallic object, smaller than a planet but bigger than a meteoroid, that orbits the Sun or another star; also known as a minor planet.
		As of November 16, 2005, from a total of 305,224 minor planets with calculated orbits, 120,437 asteroids had been calculated well enough to be given official numbers and 12,712 of these had been officially given trivial names to go along with the numbers (at least 610 of which have names requiring diacritics).
		The asteroid moon Petit-Prince was named after the character, and 46610 BÃ©sixdouze after his asteroid.
	www.juliantrubin.com /encyclopedia/astronomy/asteroid.html (3590 words)

	Asteroids - Crystalinks
		The expected motion of the missing planet was about 30 seconds of arc per hour, readily discernable by observers.Ironically, the first asteroid, 1 Ceres, was not discovered by a member of the group, but rather by accident in 1801 by Giuseppe Piazzi director, at the time, of the observatory of Palermo, in Sicily.
		Notable asteroid hunters of this early era were J. Hind, Annibale de Gasparis, Robert Luther, H. Goldschmidt, Jean Chacornac, James Ferguson, Norman Robert Pogson, E. Tempel, J. Watson, C. Peters, A. Borrelly, J. Palisa, Paul Henry and Prosper Henry and Auguste Charlois.
		Ida, like Gaspra, is an S-type asteroid, meaning that it is a reddish object composed of a mixture of the minerals pyroxene, olivine, and iron.
	www.crystalinks.com /asteroids.html (2144 words)

	Wikinfo \| Asteroid
		Minor planets whose semi-major axes are beyond that of Jupiter, and which are primarly made of ice are either comets, Centaurs, or Trans-Neptunian objects.
		Between all of the automated systems, 2298 near-Earth asteroids have been discovered [3].
		Images, some of which are used under the doctrine of Fair use or used with permission, may not be available.
	www.wikinfo.org /wiki.php?title=Asteroid (1303 words)

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