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  1. Jun 16, 2020 · The oddities of Triton could fill an almanac: As Neptune rotates, Triton orbits in the opposite direction. No other large moon in the solar system does that. And Triton’s orbit lies at an extreme tilt, offset from Neptune’s equator by 23 degrees. About three-quarters the diameter of our own Moon, Triton isn’t where it used to be, either.

    • Discovery
    • Overview
    • How Triton Got Its Name

    Triton was discovered on Oct. 10, 1846 by British astronomer William Lassell, just 17 days after Neptune itself was discovered.

    Triton is the largest of Neptune's 13 moons. It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet's rotation―a retrograde orbit. 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 know...

    Triton is named after the son of Poseidon (the Greek god comparable to the Roman Neptune). Until the discovery of the second moon Nereid in 1949, Triton was commonly known as simply "the satellite of Neptune."

  2. science.nasa.gov › neptune › neptune-moonsTriton - NASA Science

    Discovery Triton was discovered on Oct. 10, 1846 by British astronomer William Lassell, just 17 days after Neptune itself was discovered. Overview Triton is the largest of Neptune’s 13 moons. It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet’s rotation―a retrograde […]

  3. Nov 12, 2024 · Global color mosaic of Neptune's largest moon, Triton, taken by NASA's Voyager 2 in 1989. Credit: NASA/JPL-Caltech/USGS ... An ambitious mission to Neptune could study both the planet and Triton ...

  4. Nov 11, 2024 · UT – An Ambitious Mission to Neptune Could Study Both the Planet and Triton Lead Image: Global color mosaic of Neptune’s largest moon, Triton, taken by NASA’s Voyager 2 in 1989.

  5. Jun 18, 2020 · The oddities of Triton could fill an almanac: As Neptune rotates, Triton orbits in the opposite direction. No other large moon in the solar system does that. And Triton’s orbit lies at an extreme tilt, offset from Neptune’s equator by 23 degrees. About three-quarters the diameter of our own Moon, Triton isn’t where it used to be, either.

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  7. Feb 13, 2020 · Trident would explore Triton, a unique and highly active icy moon of Neptune, to understand pathways to habitable worlds at tremendous distances from the Sun. NASA's Voyager 2 mission showed that Triton has active resurfacing - generating the second-youngest surface in the solar system - with the potential for erupting plumes and an atmosphere.