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  1. nasa.gov
    https://solarsystem.nasa.gov › moons › neptune-moons › proteus › in-depth.amp

    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 …

  2. nasa.gov
    https://solarsystem.nasa.gov › planet-compare

    Planet Compare – NASA Solar System Exploration

    Oct 21, 2025 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.

  3. nasa.gov
    https://solarsystem.nasa.gov › moons › neptune-moons › triton › in-depth.amp

    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, …

  4. nasa.gov
    https://solarsystem.nasa.gov › moons › neptune-moons › in-depth.amp

    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 …

  5. nasa.gov
    https://solarsystem.nasa.gov

    RPS 3D Viewer - NASA Solar System Exploration

    Oct 21, 2025 · 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 & …

  6. nasa.gov
    https://solarsystem.nasa.gov › gltf_embed

    Neptune 3D Model – NASA Solar System Exploration

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  7. nasa.gov
    https://solarsystem.nasa.gov › solar-system › kuiper-belt › in-depth.amp

    In Depth | Kuiper Belt – NASA Solar System Exploration

    As Neptune tossed icy objects sunward, this caused its own orbit to drift even farther out, and its gravitational influence forced the remaining icy objects into the range of locations where we find them …

  8. nasa.gov
    https://solarsystem.nasa.gov › solar-system › our-solar-system › in-depth.amp

    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; …

  9. nasa.gov
    https://solarsystem.nasa.gov › internal_resources
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    Kuiper Belt and Oort Cloud - NASA Solar System Exploration

    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 …

  10. nasa.gov
    https://solarsystem.nasa.gov › moons › in-depth.amp

    In Depth | Moons – NASA Solar System Exploration

    In the outer solar system, the gas giants Jupiter and Saturn and the ice giants Uranus and Neptune have dozens of moons. As these planets grew in the early solar system, they were able to capture smaller …