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- In Depth | Proteus – NASA Solar System Exploration
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 into a sphere Proteus orbits Neptune about every 27 hours
- Planet Compare - NASA Solar System Exploration
NASA’s real-time science encyclopedia of deep space exploration Our scientists and far-ranging robots explore the wild frontiers of our solar system
- In Depth | Neptune Moons – NASA Solar System Exploration
Dutch-American astronomer Gerard Kuiper (for whom the Kuiper Belt was named) found Neptune's third-largest moon, Nereid, in 1949 He missed Proteus, the second-largest because it's too dark and too close to Neptune for telescopes of that era
- In Depth | Triton – NASA Solar System Exploration
Scientists think Triton is a Kuiper Belt Object captured by Neptune's gravity millions of years ago It shares many similarities with Pluto, the best known world of the Kuiper Belt Like our own moon, Triton is locked in synchronous rotation with Neptune―one side faces the planet at all times
- RPS 3D Viewer - NASA Solar System Exploration
Moons About Moons BY DESTINATION Earth (1) Mars (2) Jupiter (95) Saturn (83) Uranus (27) Neptune (14) Pluto (5) Asteroids, Comets Meteors About Asteroids, Comets Meteors BY TYPE
- Neptune 3D Model – NASA Solar System Exploration
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- In Depth | Kuiper Belt – NASA Solar System Exploration
As Uranus and Neptune drifted farther outward, they passed through the dense disk of small, icy bodies left over after the giant planets formed Neptune's orbit was the farthest out, and its gravity bent the paths of countless icy bodies inward toward the other giants
- In Depth | Our Solar System – NASA Solar System Exploration
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; dozens of moons; and millions of asteroids, comets, and meteoroids
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