In the 1940s and 1950s, astronomers Kenneth Edgeworth and Gerard Kuiper independently predicted that a reservoir of icy rocks lay beyond the orbit of Neptune. (discovermagazine.com)
Scientists think that objects in the Kuiper Belt, a vast region of dwarf planets and icy rocks populating the fringes of our solar system beyond the orbit of Neptune, dance mostly to the tune of the giant planets, Saturn, Jupiter, Uranus and Neptune, influenced by their gravity either directly or indirectly. (sciencedaily.com)
Planetary scientists now suspect Phoebe started out in the Kuiper belt, a region of icy rocks at the outer edge of the solar system. (discovermagazine.com)