The researchers believe the planet's gravity then pulled small rocky or icy bodies out of the main disc and into the plane of its orbit. (newscientist.com)
That's most likely because they are fragments of a larger icy body, say a planet, that recently broke up, the researchers suggest. (sciencemag.org)
If the early results hold up, this time it's the dwarf planet Eris's turn to be demoted, and Pluto might have just regained its status as the largest object in the Kuiper Belt, the ring of icy bodies beyond Neptune. (newscientist.com)