Floating around at the edge of the Solar System are leftovers from its formation. This is the Kuiper Belt, which is composed ...

New research suggests that a binary pair of Kuiper Belt objects, known as the Altjira system, is actually made up of three ...

A ring or sphere could, apparently, be stable if surrounded by the right sizes and gravities of other stars.

Astronomers have discovered what they believed to be a rare stable trio of gravitationally bound Kuiper Belt objects, ...

It's a new type of three-body problem for astronomers, who used the Hubble Space Telescope to determine that twin asteroids ...