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    Discovery of five irregular moons of Neptune

    Each giant planet of the Solar System has two main types of moons. ‘Regular’ moons are typically larger satellites with prograde, nearly circular orbits in the equatorial plane of their host planets at distanc...

    Matthew J. Holman, J. J. Kavelaars, Tommy Grav, Brett J. Gladman in Nature (2004)

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    Discovery of 12 satellites of Saturn exhibiting orbital clustering

    The giant planets in the Solar System each have two groups of satellites. The regular satellites move along nearly circular orbits in the planet's orbital plane, revolving about it in the same sense as the pla...

    Brett Gladman, J. J. Kavelaars, Matthew Holman, Philip D. Nicholson in Nature (2001)

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    The red ragged edge

    Small objects in the Kuiper belt - a zone at the very edge of our Solar System - appear to come in two shades. The redder ones may be furthest from the Sun.

    Brian G. Marsden in Nature (2000)

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    Discovery of two distant irregular moons of Uranus

    The systems of satellites and rings surrounding the giant planets in the Solar System have remarkably similar architectures1. Closest to each planet are rings with associated moonlets, then larger ‘regular’ satel...

    Brett J. Gladman, Philip D. Nicholson, Joseph A. Burns, JJ Kavelaars in Nature (1998)

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    A new dynamical class of object in the outer Solar System

    Some three dozen objects have now been discovered1,2,3,4,5 beyond the orbit of Neptune and classified as members of the Kuiper belt—a remnant population of icy planetesimals that failed to be incorporated into pl...

    Jane Luu, Brian G. Marsden, David Jewitt, Chadwick A. Trujillo in Nature (1997)