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Topic: Supernova remnant

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Supernova 1604

Supernova

SN 1987A

Nebula

Crab Nebula

Supernova 1987a

White dwarf

Kepler

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	Supernova remnant Info - Encyclopedia WikiWhat.com (Site not responding. Last check: 2007-11-07)
		There are two possible routes to this end: either a massive star may cease to generate fusion energy in its core, and collapse inward under the force of its own gravity, or a white dwarf star may accumulate material from a companion star until it reaches a critical mass and undergoes a similar collapse.
		Perhaps the most famous and best-observed supernova remnant is Supernova 1987a, the newly formed remnant of a supernova in the Large Magellanic Cloud.
		A few other well-known supernova remnants are the Crab Nebula, a remnant of a relatively recent explosion (AD 1054); Tycho, a remnant named after Tycho Brahe, who recorded the brightness of its original explosion (AD 1572); and Kepler's SNR (Supernova 1604), named after Johannes Kepler.
	wikiwhat.com /encyclopedia/s/su/supernova_remnant.html (297 words)

	supernova in TutorGig Encyclopedia (Site not responding. Last check: 2007-11-07)
		Supernova explosions are the main source of all the elements heavier than oxygen, and they are the only source of many important elements.
		Supernovae generate tremendous temperatures, and under the right conditions, the fusion reactions that take place during the peak moments of a supernova can produce some of the heaviest elements like californium.
		Supernovae tend to enrich the surrounding interstellar medium with metals (for astronomers, metals are all the elements after helium).
	www.tutorgig.com /ed/supernova (3152 words)

	ScienceDaily: Astronomers Discover "Bulls-Eye" Pulsar In Supernova Remnant
		Chandra's image of the supernova remnant SNR G54.1+0.3 reveals a bright, point-like central source, which is surrounded by a ring and two jet-like structures in an extended nebula of high-energy particles.
		Young Pulsar Reveals Clues To Supernova (September 12, 2001) -- Astronomers examined the remnants of a stellar explosion with NASA's Chandra X-ray Observatory and discovered one of the youngest known pulsars.
		Supernova -- Supernova refers to several types of stellar explosions that produce extremely bright objects made of plasma that decline to invisibility over weeks or...
	www.sciencedaily.com /releases/2002/06/020626070634.htm (1813 words)

	Encyclopedia Galactica - Ve to Vh - Human (Anglic) Revised 351st Edition
		Originally the logo was the logo of the Immunity project fighting the nanodisaster, but later it was adapted with slight modifications to form the government logo.
		In 9500 the newly settled world of Swallowflight in the Vela Supernova nebula suffered a major nanotech disaster, nearly destorying the entire biosphere.
		This nebula is the remnant of a supernova that exploded about 8,000 years b.c.e.
	www.orionsarm.com /eg/v/Ve-Vh.html (1584 words)

	NebulaeDrawings (Site not responding. Last check: 2007-11-07)
		They can be monsterous and complex agglomerations, or simple remnants of dead and dying stars.
		The leftovers and waste that a star leaves behind upon its death can eventually be part of a cosmic re-combination effort to form another star or a group of stars (interstellar recycling).
		A Supernova Remnant (i.e., the Crab Nebula pictured here) is the remains of an ancient massive stellar explosion.
	www.belmontnc.4dw.net /nebulae.htm (2949 words)

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