Visual: In this diagram, J, S, U, and N are the solar system’s giant planets. What’s the collective name for the objects in ...

Material around Chiron, a small icy world in the far reaches of the solar system, may be taking shape into a ring system of ...

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 ...

The Subaru Telescope has made an exciting discovery: a small body beyond Pluto, with implications for the formation, evolution, and current structure of the outer solar system. The object was found as ...

Astronomers are tracking strange orbital patterns in the outer Solar System that suggest a massive unseen planet may exist ...

A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar System. Named 2023 KQ14, this rare “sednoid” follows an unusual orbit that ...