Both bright rings have material throughout their entire orbit, and are therefore continuous.Īt their densest, the rings are comparable to the less dense portions of Saturn’s main rings such as the C ring and the Cassini Division, but much of Neptune’s ring system is quite tenuous, faint and dusty, more closely resembling the rings of Jupiter. Numerous bright stars are evident in the background. The bright glare is due to over-exposure of the crescent on Neptune. Both of these newly discovered rings are broad and much fainter than the two narrow rings. Also visible in this image is the inner faint ring and the faint band which extends smoothly from the ring roughly halfway between the two bright rings. The two main rings are clearly visible and appear complete over the region imaged. This 591-second exposure of the rings of Neptune was taken with the clear filter by the Voyager 2 wide-angle camera. Two asteroids share the same names as moons of Neptune: 74 Galatea and 1162 Larissa. More about the moons of Neptune in Wikipedia and Seasky See Wikipedia for more information about Neptune. So far as I know, no other plans exist for another visitor. Voyager 2 is the only spacecraft to have visited Neptune, and it continued on into the outer reaches of the solar system. The sidereal rotational period of Neptune is 16 hours, 6 minutes, 36 seconds. Its mean density is 1.638 g/cm 3, so, although almost a twin of Uranus in size it is denser. Neptune orbits the Sun once in 60,190.03 Earth days (164.79 years, or 89,666 Neptune solar days). It has a ring system, exhibiting significant differences from those of other ringed planets. The satellites are Triton, Nereid, and several other small objects first seen in recent years. It has 13 known satellites, named after lesser sea gods than Neptune. Its discovery in 1846 is clothed in controversy, though Galileo is reported to have seen it in 16, not recognising its significance. Neptune is the eighth planet from the Sun in the Solar System, and never known to the ancients. Neptune showing some spots probably in its atmosphere
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