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  2. 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). Sometimes Neptune is even farther from the Sun than dwarf planet Pluto.

    • NASA Science

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

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

    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).

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

    Oct 20, 2023 · Rotation: It takes Neptune only 16 Earth hours for it to spin on its axis once. Surface: Like the other gas-giant planets, Neptune’s “surface” is the top of its deep atmosphere. This...

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  6. 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.

  7. www.space.com › 13229-neptune-day-lengthA Day on Neptune Is Just 16 Hours Long, Study Reveals - Space.com

    Oct 9, 2011 · But Erich Karkoschka, of the University of Arizona, managed to use these shifting features to calculate how long it takes Neptune to rotate on its axis and complete one day: 15 hours, 57...

  8. solarsystem.nasa.gov › module › 9410 Need-to-Know Things About Neptune - NASA Solar System ...

    Neptune takes about 16 hours to rotate once (a Neptunian day), and about 165 Earth years to orbit the sun (a Neptunian year).

  9. www.astronomy.com › science › clocking-neptunes-spinClocking Neptune's spin | Astronomy.com

    Jun 30, 2011 · A day on Neptune lasts precisely 15 hours, 57 minutes, and 59 seconds, according to the first accurate measurement of its rotational period made by Erich Karkoschka from University...