A newly identified Kuiper Belt trio, possibly only the second of its kind, could provide strong evidence that these distant ...

Scientists have discovered a potential three-body system in the Kuiper Belt, the Altjira system, challenging planet-formation theories.

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

The puzzle of predicting how three gravitationally bound bodies move in space has challenged mathematicians for centuries, and has most recently been popularized in the novel and television show "3 ...

With family wealth to back him, he founded an observatory in the western dark-sky desert of the U.S. and hoped to unlock the mystery of the Red Planet. He soon became fascinated by another cosmic ...

Early in our Solar System’s history, bits of icy debris were scattered and then gradually coaxed into a spiral alignment in ...

The largest KBO is dwarf planet Pluto. The Hubble finding is crucial ... bodies would not be the result of collision in a busy Kuiper Belt, but instead form as a trio directly from the ...

The Altjira system joins the dwarf planet Pluto and the "space snowman" Arrokoth, a contact binary composed of two touching space rocks, as the most heavily studied bodies in the Kuiper Belt.

After 17 years of observation, researchers are certain that what they thought was a group of two celestial bodies is actually ...

In 2006, the International Astronomical Union (IAS) reclassified Pluto as a dwarf planet. That decision came several years after discovering the Kuiper Belt, a ring of icy and rocky objects 2.8 ...