In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new dwarf planet. It's called 2017 OF 201, a rock that appears to be some 700 ...

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously ...

Far beyond Neptune, astronomers have finally confirmed a compact clump of icy worlds hiding inside the Kuiper Belt, a feature ...

Astronomers at Princeton University have uncovered evidence that the outer solar system is more structured than long believed ...

Somewhere at the edge of the solar system a new Earth-sized world might be lurking, dubbed Planet Y. Astronomers have long proposed that there might be hidden planets beyond the Kuiper belt, a region ...

Tiny grains from asteroid Ryugu are revealing clues to the magnetic forces that shaped the far reaches of the solar system over 4.6 billion years ago. The findings suggest the distal solar system ...

The orbit of 2023 KQ 14 (in red) compared to the orbits of the other three sednoids (in white). 2023 KQ 14 was discovered near its perihelion at a distance of 71 astronomical units (71 times the ...