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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.
Neptune: 0.67125 days [3] 0 d 16 h 6 m 36 s: 0.671 25 d (16 h 6 m 36 s) [10] Pluto: ... Day length fluctuations; Earth's rotation periods; List of slow rotators ...
Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times the mass of Earth and slightly larger than Neptune. [a] Neptune orbits the Sun once every 164.8 years at an average distance of 30.1 astronomical units (4.50 × 10 9 km).
The radio instruments on board found that Neptune's day lasts 16 hours and 6.7 minutes. Neptune's rings had been observed from Earth many years prior to Voyager 2 's visit, but the close inspection revealed that the ring systems were full circle and intact, and a total of four rings were counted. [4] Voyager 2 discovered six new small moons ...
Neptune has long been known to have white clouds circling it, but images of the furthest planet in the solar system have shown this changing over time - the most recent image, taken by the Hubble ...
The last time Neptune's rings were seen in detail was during a flyby in 1989 by NASA's Voyager 2 spacecraft as it journeyed beyond the solar system and into interstellar space. That historic flyby ...
The symbols for the first four asteroids, Ceres through Vesta, remained in use for longer than the others, [153] and even in the modern day NASA has used the Ceres symbol—Ceres being the only asteroid that is also a dwarf planet. [262] Neptune's symbol (♆) represents the god's trident. [260]
That same day, Neptune stations direct in Pisces (your ninth house of expansion), offering clarity on your beliefs and how they influence your love life and romantic experiences as a whole.