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                                         ~ Nereid Sources ~

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                                         ~ Nereid Sources ~

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http://solarsystem.nasa.gov/planets/nereid/indepth
Nereid

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                                            ~ Triton  Sources ~

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                                            ~ Triton  Sources ~

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http://space-facts.com/triton/

http://www.space.com/22223-triton-moon.html

http://www.windows2universe.org/neptune/moons/triton_atmosphere.htm

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~ Triton’s satellite sibling
~Discovered in 1949
~Color is unlike any normal satellite or asteroid.
~ “Possibility that Nereid has a highly irregular shape, so when its largest part faces the Earth, more light is reflected than when the smallest part is in front.
~ Scientist know of no other satellites in Nereid’s size that are that irregular
~ Estimate the diameter to be at least 660 km, and theorist believe the gravity of any object larger than 400 km makes it spherical

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~  Gerard discovered Nereid with a ground-based telescope. It was the last satellite of Neptune to be discovered before Voyager 2’s discoveries four decades later
~ How Nereid got its name: Is named after the Nereids, sea-nymphs, in Greek mythology. Kuiper proposed the name when he reported his discoveries.

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~ Nereid is Neptune's  3rd largest moon

~  Is the second moon to be discovered

~ Nereid was discovered by outer solar system astronomer, Gerard P.  Kuiper on May 1, 1949
~ Is one of the outermost of Neptune's known moons
~ Nereid is unique because it has one of the most eccentric orbits of any moon in our solar system
~ Is so far from Neptune that it requires 360 Earth days to make one orbit = odd orbit suggest that Nereid may be a captured asteroid or Kuiper Belt object or that it was greatly disturbed during t the capture of Neptune's largest moon Triton
~

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~  Nereid ~

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~ Triton is slightly smaller than Earth's moon
~ Triton is colder than any other surface of any other planet or moon in our solar system!
~ The surface is so cold almost everything freezes, even gases! - That's why it is surprising that Triton has an atmosphere

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~ "NASA released the best high-resolution map of Triton to date in 2014 in anticipation of the flyby, because it is believed that Triton and Pluto could share a similar history. They are similar in size, have nitrogen in their atmospheres and icy surfaces"

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~ "Triton will wander too close to Neptune in its orbit in about 3.5 billion years, and the gravitational pull of the planet will break Triton up. The result will be a ring system"  Says http://www.space.com/22223-triton-moon.html
~ Voyager 2 was the only spacecraft to visit and map Triton. Voyager 2 flew by Triton in 1989. There has not been any other missions planned to Neptune or Triton in the foreseeable future.

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~ Triton was discovered by British astronomer William Lassell on October 10, 1846. 17 days after Neptune was discovered.
~ Triton is known as a "Frozen Wonderland"
~ It has a strange array of terrain types. Including the  "cantaloupe terrain"
~ Triton also has icy surfaces with craters and geysers, these all indicate some sort of activity going on inside
~ The geysers on Triton are spewing out nitrogen gas out from beneath the surface into long plumes that rise as high as 8 kilometers (8 miles)! Therefore Triton has a very thing atmosphere

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~ The answer is no, because Triton is inside the magnetosphere of Neptune, which is very harmful to life.

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                                  Triton:

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                                  Triton:

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~ Triton is Neptune's largest moon

~ The only moon in the solar system to orbit in the opposite direction to its planet's rotation
~ This is known as a retrograde
~ The surface temperature is -135 degrees C (-211 degrees F)
~ The orbit period is 5.9 days (retrograde)
~ The orbit distance is 354,759 km (220,437.0228 miles)
~ The diameter is 2,706 km (1681.4304 miles)