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Topic: Triton (moon)

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Nereid (moon)

Proteus (moon)

Larissa (moon)

Galatea (moon)

Retrograde orbit

Charon (moon)

Io (moon)

Iapetus (moon)

Callisto (moon)

Natural satellite

List of solar system objects

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	Neptune's Moon Triton
		Triton [TRY-tun] is the largest moon of Neptune, with a diameter of 2,700 kilometers (1,680 miles).
		With Triton's long seasons, the southern summer has been progressing, and the south pole has received increasing sunlight; thus, it is probable that much of the frost covering the region in 1989 has evaporated, some of which may have condensed at the equator (hence the bright region there).
		Triton's surface is mostly covered by nitrogen frost mixed with traces of condensed methane, carbon dioxide, and carbon monoxide.
	www.solarviews.com /eng/triton.htm (1455 words)

	Triton
		Of the 8 moons, it is the 2nd farthest from Neptune, with a standoff distance of 354,800 km.
		Triton may be one of the largest of the icy moons, is comparable to Europa, with a diameter of 2700 km (1800 miles).
		Triton is very interesting, it has a unique and fascinating surface, and is one of the few moons with the possibility for a weak atmosphere and an environment suitable for life.
	www.windows.ucar.edu /tour/link=/neptune/moons/triton.html (208 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: 2007-11-07)
		Triton is unique among all large moons in the solar system for its retrograde orbit around the planet (i.e., it orbits in a direction opposite to the planet's rotation).
		Moons in retrograde orbits cannot form out of the same region of the solar nebula as the planets they orbit, but must be captured from elsewhere or turn retrograde through collision.
		The surface temperature is at least 35.6 K (â’237Â°C) because Triton's nitrogen ice is in the warmer, hexagonal beta crystalline state, and the phase transition between beta and cubic alpha nitrogen ice is that temperature.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Triton_(moon) (1957 words)

	Neptune's Moon Triton
		Triton [TRY-tun] is the largest moon of Neptune, with a diameter of 2,700 kilometers (1,680 miles).
		Triton is the only large satellite in the solar system to circle a planet in a retrograde direction -- in a direction opposite to the rotation of the planet.
		Triton's surface is mostly covered by nitrogen frost mixed with traces of condensed methane, carbon dioxide, and carbon monoxide.
	www.if.ufrgs.br /ast/solar/eng/triton.htm (1277 words)

	Triton
		In Greek mythology, Triton is a god of the sea, the son of Poseidon (Neptune); usually portrayed as having the head and trunk of a man and the tail of a fish.
		Triton could not have condensed from the primordial Solar Nebula in this configuration; it must have formed elsewhere (perhaps in the Kuiper Belt?) and later been captured by Neptune (perhaps involving a collision with another now shattered Neptunian moon).
		Triton, Io and Venus are the only bodies in the solar system besides Earth that are known to be volcanically active at the present time (though Mars clearly was in the past).
	www.seds.org /nineplanets/nineplanets/triton.html (729 words)

	MIT researcher finds evidence of global warming on Neptune's largest moon - MIT News Office
		Triton is a simpler subject than Earth for studying the causes and effects of global warming.
		By detecting that Triton's atmosphere had thickened, astronomers were able to deduce that the temperature of the ice on Triton's surface has increased.
		Triton is a bit smaller than our moon, but its gravity is able to keep an atmosphere from completely escaping because it is so cold.
	web.mit.edu /newsoffice/1998/triton.html (849 words)

	Sea and Sky's Tour of the Solar System: Triton
		This moon of Neptune was discovered by the British astronomer William Lassell in 1846.
		Triton's axis of rotation is tilted 157 degrees with respect to Neptune's axis.
		This causes the moon's polar and equatorial regions to be alternately pointed towards the Sun.
	www.seasky.org /solarsystem/sky3i2.html (430 words)

	Triton Handout (Site not responding. Last check: 2007-11-07)
		Triton is colder than any other measured object in the Solar System with a surface temperature of -235° C. It has an extremely thin atmosphere.
		Triton is one of only three objects in the Solar System known to have a nitrogen-dominated atmosphere (the others are Earth and Saturn's giant moon, Titan).
		Triton has the coldest surface known anywhere in the Solar System (38 K); it is so cold that most of Triton's nitrogen is condensed as frost, making it the only satellite in the Solar System known to have a surface made mainly of nitrogen ice.
	btc.montana.edu /ceres/html/ExtremeEnvironment/ExtremeTriton.htm (391 words)

	Triton - Satellite of Neptune - Astronomy
		Triton is the only known satellite that moves in a retrograde direction (opposite the rotation of the planet it orbits).
		Triton’s landscape is dotted with volcanic structures, similar to geysers, that emit nitrogen gas.
		Triton is the coldest known object in the Solar System, with a surface temperature of -391 degrees Fahrenheit.
	www.bellaonline.com /articles/art40363.asp (386 words)

	The Solar System: Neptune's Moon Triton (Site not responding. Last check: 2007-11-07)
		Triton [TRY-tun] is the largest moon of Neptune, with a diameter of 2,700 kilometers (1,680 miles).
		Triton is colder than any other measured object in the Solar System with a surface temperature of -235 C (-391 F).
		Triton is the only large satellite in the solar system to circle a planet in a retrograde direction -- in a direction opposite to the rotation of the planet.
	www.ulo.ucl.ac.uk /~diploma/year_one/solar_system2/triton.html (238 words)

	NEPTUNE’S SATELLITE IV
		Triton is the seventh known satellite from the planet.
		Triton has a retrograde orbit, which means that it moves clockwise as seen from Neptune’s north pole.
		Triton is the only large body in the solar system with a retrograde orbit, leading scientists to theorize that Neptune captured it from an independent orbit around the sun.
	www.geocities.com /beyondearth2001/triton.htm (421 words)

	Triton - Overview and Pictures
		Discovered by William Lassell in 1846, Triton is one of the most interesting moons in the Solar System, and one being studied quite a bit recently by scientists.
		It's a pretty large moon, having a diameter of 2700km and is Neptune's seventh satellite.
		Like Mars' moon Phobos, Triton is expected to, sometime in the distant future, crash into Neptune, due to a combination of Triton's (unusual) retrograde orbit and tidal interactions with Neptune.
	www.solarspace.co.uk /Neptune/triton.php (246 words)

	Voyager - Science - Planetary Voyage - Neptune - Triton
		Triton has a diameter of about 2,705 kilometers (1,680 miles) and a mean density of about 2.066 grams per cubic centimeter (the density of water is 1.0 gram per cubic centimeter).
		Triton is very bright, reflecting 60 to 95 percent of the sunlight that strikes it (by comparison, Earth's Moon reflects 11 percent).
		Triton appears to have the same general size, density, temperature and chemical composition as Pluto (the only outer planet not yet visited by any spacecraft), and will probably be our best model of Pluto for a long time to come.
	voyager.jpl.nasa.gov /science/neptune_triton.html (630 words)

	Solar System Exploration: Planets: Neptune: Moons: Triton
		Triton is colder than any other measured object in the Solar System with a surface temperature of -235° C (-391° F).
		Triton is the only large satellite in the solar system to circle a planet in a retrograde direction - in a direction opposite to the rotation of the planet.
		Triton has the coldest surface known anywhere in the Solar System (38 K, about -391° Farenheit); it is so cold that most of Triton's nitrogen is condensed as frost, making it the only satellite in the Solar System known to have a surface made mainly of nitrogen ice.
	solarsystem.nasa.gov /planets/profile.cfm?Object=Nep_Triton (511 words)

	Triton
		In Greek mythology, Triton is a god of the sea, the son of Poseidon (Neptune); usually portrayed as having the head and trunk of a man and the tail of a fish.
		Triton could not have condensed from the primordial Solar Nebula in this configuration; it must have formed elsewhere (perhaps in the Kuiper Belt?) and later been captured by Neptune (perhaps involving a collision with another now shattered Neptunian moon).
		Triton, Io and Venus are the only bodies in the solar system besides Earth that are known to be volcanically active at the present time (though Mars clearly was in the past).
	seds.lpl.arizona.edu /nineplanets/nineplanets/triton.html (729 words)

	Moons of the Giant Planets
		In mythology, Triton was a sea god with the head and upper body of a man and the tail of a fish.
		The moon Triton is similarly "made in two parts." The orbit of Triton is currently circular, but it probably was not so early on.
		Triton was captured by collision with a primordial regular moon of Neptune several billion years ago.
	www.astro.washington.edu /labs/clearinghouse/labs/GiantPlanets/moonsgiants.html (1655 words)

	Neptune's Moon Triton - Explore the Cosmos \| The Planetary Society
		Triton is overwhelmingly the largest of Neptune’s moons and the only large moon in the solar system to travel in a retrograde (backwards) direction around its primary.
		Triton may well be a captured Kuiper Belt Object, perhaps the only one seen by a spacecraft.
		The trailing hemisphere of Triton is covered with a terrain so far unique in the solar system: a puckered surface that immediately became known as “cantaloupe terrain.” The cantaloupe terrain is cut by a few, widely spaced, paired ridges or troughs.
	www.planetary.org /explore/topics/neptune/triton.html (330 words)

	Neptune's Moons
		Triton is next (right), and is one of the strangest moons in the solar system.
		First, it is one of only three moons in the solar system that has an atmosphere (Jupiter's Io and Saturn's Titan are the other two).
		One theory is that Triton must have actually hit Neptune, bounced off the atmosphere, and gone into orbit because it lost all of its momentum.
	filer.case.edu /~sjr16/neptune_moons.html (427 words)

	Neptune's largest moon is warming up
		Triton, however, is a very different and simpler world than Earth, with a much thinner atmosphere, no oceans, and a surface of frozen nitrogen.
		The scientists are basing a rise in Triton's surface temperature on the Hubble telescope's detection of an increase in the moon's atmospheric pressure, which has at least doubled in bulk since the time of the Voyager encounter.
		When Triton passed in front of a star known as "Tr180" in the constellation Sagittarius, the guidance sensor measured the star's gradual decrease in brightness as Triton passed in front of it.
	www-old.astro.up.pt /nd/astro_news/98/uk98-7.1.html (651 words)

	Planetary Science
		Neptune's large moon, Triton, is about 80% the diameter of the Moon and has a density of 2.1 times the density of water.
		Triton has many fl streaks on its surface that may be from volcanic venting of nitrogen heated to a gaseous state despite the very low temperatures by high internal pressures.
		Triton's strange orbit and the very elliptical orbit of Neptune's other major moon, Nereid, leads to the proposal that Triton was captured by Neptune when Triton passed too close to it.
	www.astronomynotes.com /solarsys/s15.htm (687 words)

	jupiter's moons
		It has a lot of small moons orbiting close to the planet, some midsized ones orbiting farther away, and in the midst of these, a single large moon, Titan, that is the only moon with a substantial atmosphere.
		As with almost all moons, the moons of Uranus orbit in planes that are very nearly parallel to the planet's equatorial plane.
		Triton is moving in a retrograde direction, and its orbit is slowly decreasing in size.
	www.gpc.edu /~fbuls/weblabs/moons/moons11.htm (2876 words)

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