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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).

  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).

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  5. www.universetoday.com › 21602How Long is a Day on Neptune? - Universe Today

    Neptune’s equatorial zone takes about 18 hours to complete a rotation – that’s slower than the planet’s averate 16.1 hour rotation period. And the polar regions can take just 12 hours to...

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

    Oct 9, 2011 · Not long after Neptune completed its first orbit around the sun since its discovery in 1846, scientists have managed to calculate the exact length of one day on the distant gas giant planet.

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

    The long orbital period of Neptune means that the seasons last for forty Earth years. [110] Its sidereal rotation period (day) is roughly 16.11 hours. [12] Because its axial tilt is comparable to Earth's, the variation in the length of its day over the course of its long year is not any more extreme.

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

    Sep 17, 2024 · Time on Neptune. One day on Neptune goes by in 16 hours. Neptune has such a long journey around the Sun it takes 165 Earth years to go around once. That’s a long year! Neptune's Neighbors. Neptune has 16 moons. Neptune is the eighth and most distant planet from the Sun. That means Uranus is Neptune’s only neighboring planet. Quick History

  9. coolcosmos.ipac.caltech.edu › ask › 145-How-long-isHow long is a day on Neptune? - Cool Cosmos

    A planet's day is the time it takes the planet to rotate or spin once on its axis. Neptune rotates faster than Earth so a day on Neptune is shorter than a day on Earth. A day on Neptune is about 16 Earth hours while a day on Earth is 23.934 hours.