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Topic: Comet Biela

	3D/Biela -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-16)
		It is sometimes known as Comet Biela or Biela's Comet.
		It was only the third comet (at the time) found to be periodic, after the famous comets (English astronomer who used Newton's laws of motion to predict the period of a comet (1656-1742)) Halley and (Click link for more info and facts about Encke) Encke.
		In 1872, a brilliant (A transient shower of meteors when a meteor swarm enters the earth's atmosphere) meteor shower was observed radiating from the part of the sky where the comet had been expected to appear.
	www.absoluteastronomy.com /encyclopedia/3/3d/3dbiela2.htm (329 words)

	Comet
		The second comet to be discovered to have a periodic orbit was Comet Encke, in 1821.
		He created a theory about the brightness of the comets coming from the evaporation from a solid object and that the non-gravitational forces of Comet Encke were caused by the jet forces created as the material evaporated from the surface of the object.
		It soon became the accepted comet model and was confirmed when an armada of spacecraft (including the European Space Agency's Giotto probe and the Soviet Union's Vega 1 and Vega 2) flew through the coma of Halley's comet in 1986 to photograph the nucleus and observed the jets of evaporating material.
	www.brainyencyclopedia.com /encyclopedia/c/co/comet.html (1592 words)

	comet. The Columbia Encyclopedia, Sixth Edition. 2001-05
		In 1705, however, Edmond Halley concluded that the comet observed in 1682 was the same one that had been described in 1531 and 1607, and he predicted that it would return again in late 1758 or early 1759.
		As it approaches the sun the nucleus becomes enveloped by a luminous “cloud” of dust and gases called the coma; this luminosity is caused by the molecules absorbing and reflecting the radiation of the sun.
		Some of this material moves around the comet’s orbit as a stream of meteoroids (see meteor); when the earth passes through this path, a meteor shower is observed.
	www.bartleby.com /65/co/comet.html (1100 words)

	Comet Article, Comet Information (Site not responding. Last check: 2007-10-16)
		Comets are thought of as debris left over from the condensation of a solar nebula ; it is generally argued that the outer edges of such nebulaeare cool enough that water exists ina solid (rather than gaseous) state.
		It was not settled whether comets are atmospheric phenomena or interplanetary objects until the 16th century, when measurements of parallax taken by Tycho Brahe revealed that they must be moving outside of the Earth'satmosphere.
		The second comet to be discovered to have a periodic orbit was CometEncke, in 1821.
	www.anoca.org /comets/orbits/comet.html (1555 words)

	ipedia.com: 3D/Biela Article (Site not responding. Last check: 2007-10-16)
		The comet was sighted in 1772 by Charles...
		The comet was sighted in 1772 by Charles Messier and in 1805 by Jean-Louis Pons.
		However, it was Wilhelm von Biela who discovered it in its 1826 perihelion approach (on February 27) and calculated its orbit, discovering it to be periodic with period 6.6 years.
	www.ipedia.com /3d_biela.html (281 words)

	definition of biela's comet
		A periodic coment, discovered by Biela in 1826, which revolves around the sun in 6.6 years.
		The November meteors (Andromedes or Bielids) move in its orbit, and may be fragments of the comet.
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	www.brainydictionary.com /words/bi/bielascomet136658.html (111 words)

	comet: Structure of Comets
		satellite discovered a constant rain of small comets impacting the earth.
		Terrestrial bodies look to the sky: The cycles of a new comet provide the structure for this debut novel.(Features)(Books) (The Christian Science Monitor)
		Comets: NASA set to investigate vagabonds of night sky (University Wire)
	www.infoplease.com /ce6/sci/A0857469.html (593 words)

	M Biela, an Austrian officer, discovers Biela's Comet February 28 in History
		M Biela, an Austrian officer, discovers Biela's Comet February 28 in History
		M Biela, an Austrian officer, discovers Biela's Comet
		Less than the dust beneath thy chariot wheel, less than the weed that grows beside thy door.
	www.brainyhistory.com /events/1826/february_28_1826_48836.html (50 words)

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