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#915793 11/21/16 07:40 AM
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Neptune, named for the Roman sea god, is the last planet out from the Sun, lying at the inner boundary of the Kuiper Belt. It has fourteen known moons and they're a mixed bag. One of them - Triton - represents over 99% of the total mass of Neptune moons. Thirteen little moons share what's left.

Neptune's Little Moons

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Here's where to find Neptune's tiniest known moon, discovered only a few years ago. Mark Showalter found it by analyzing 150 Hubble Space Telescope photos.

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The relative masses of Newton's moons. Wow! Look at Triton compared to the other 13!

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Even though Nereid was the second Neptunian moon discovered, and its third largest, it didn't pose for the photo op when Voyager 2 was in the neighborhood. Here is Nereid's Voyager 2 portrait. The image can show the moon's overall size and albedo (how well it reflects light).

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There were 50 Nereids, daughters of Nereus, and popular subjects for artists. Here is “Tritons and Nereids” by William Russell Flint (1911).


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