Overview proteus is one of the largest of neptune's known moons, although it is not as big as triton.
The moon has an odd box-like shape and if it had just a little more mass it would be able to transform.
Neptune's gravity acts as a drag on the counter-orbiting triton, slowing it down and making it drop closer and closer to the planet.
Millions of years from now, triton will come close enough for gravitational.
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Our solar system consists of our star, the sun, and everything bound to it by gravity – the planets mercury, venus, earth, mars, jupiter, saturn, uranus, and neptune;
Dwarf planets such as pluto;.
In 1943, astronomer kenneth edgeworth hypothesized that many small, icy bodies exist in a disc in the region beyond neptune, having condensed from widely spaced ancient material, and that from time.