New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

Ever since the International Astronomical Union recognized Haumea and Makemake as dwarf planets in 2008, University of Maine ...

In this episode of SolarBalls, TRITON continues his quest for origins while his companions explore an intriguing phenomenon.

An icy object in perfect sync with Neptune reveals new details about planetary migration and unseen bodies far beyond the Kuiper Belt.

Consolmagno, who has a prodigious white beard, wavy gray bangs, and dark, beetling eyebrows, is one of fifteen scientists who ...

Cultural artifacts sent to space now include human remains, commemorative disks, and symbolic payloads from missions like SpaceX and UNESCO.

The newly discovered world — a "sednoid" — challenges what planetary scientists thought they knew about the edge of the solar ...