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    • About 165 Earth years

      • One day on Neptune takes about 16 hours (the time it takes for Neptune to rotate or spin once). And Neptune makes a complete orbit around the Sun (a year in Neptunian time) in about 165 Earth years (60,190 Earth days).
      solarsystem.nasa.gov/planets/neptune/in-depth.amp

      In Depth | Neptune – NASA Solar System Exploration

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  3. science.nasa.gov › neptune › neptune-factsNeptune Facts - Science@NASA

    NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. Neptune is the eighth and most distant planet in our solar system. It was discovered in 1846. Neptune has 16 known moons.

    • NASA Science

      Dark, cold and whipped by supersonic winds, giant Neptune is...

  4. solarsystem.nasa.gov › planets › neptuneIn Depth | Neptune – NASA Solar System Exploration

    One day on Neptune takes about 16 hours (the time it takes for Neptune to rotate or spin once). And Neptune makes a complete orbit around the Sun (a year in Neptunian time) in about 165 Earth years (60,190 Earth days).

  5. en.wikipedia.org › wiki › NeptuneNeptune - Wikipedia

    Neptune is the eighth and farthest known planet from the Sun. It is the fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth and slightly more massive, but denser and smaller, than fellow ice giant Uranus.

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  7. spaceplace.nasa.gov › all-about-neptune › enAll About Neptune | NASA Space Place – NASA Science for Kids

    Sep 17, 2024 · Neptune is dark, cold, and very windy. It's the last of the planets in our solar system. It's more than 30 times as far from the sun as Earth is. Neptune is very similar to Uranus. It's made of a thick fog of water, ammonia, and methane over an Earth-sized solid center.

  8. science.nasa.gov › neptuneNeptune - NASA Science

    Dark, cold and whipped by supersonic winds, giant Neptune is the eighth and most distant major planet orbiting our Sun. More than 30 times as far from the Sun as Earth, Neptune is not visible to the naked eye.

  9. www.astronomy.com › science › neptuneNeptune: Size, distance from the Sun, orbit | Astronomy.com

    Oct 20, 2023 · Orbit around the Sun: It takes 165 Earth years for Neptune to go around the Sun one time. Rotation: It takes Neptune only 16 Earth hours for it to spin on its axis once. Surface: Like the...

  10. www.britannica.com › place › Neptune-planetNeptune | Planet, Moons, Rings, Temperature, Mass, Diameter ...

    1 day ago · Neptune, third most massive planet of the solar system and the eighth and outermost planet from the Sun. Because of its great distance from Earth, it cannot be seen with the unaided eye. With a small telescope, it appears as a tiny, faint blue-green disk. It is designated by the symbol ♆.