Steven Dutch, Professor Emeritus, Natural and Applied Sciences, University of Wisconsin - Green Bay

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The Rings of Neptune

The rings of Neptune are named for people influential in the discovery of the planet. They are:

The Moons of Neptune




Other small Moons of Neptune

All discovered by Voyager. All, including Proteus, are inside the Roche limit of Neptune, the zone where tidal forces prevent satellite formation. Hence they must have been captured or had their orbits modified somehow. Ground observation and analysis of Voyager images continue to turn up new satellites. The count as of 2008, almost certainly incomplete, is 13. Two, orbiting over 25 million miles away with periods of over 25 years, are the most distant known planetary satellites.


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Created 20 May 1997, Last Update 13 September 2018