Astronomers using the Subaru Telescope in Hawaiʻi have discovered a massive planet and a brown dwarf orbiting distant stars.

For the first time in years, astronomers are seriously talking about adding a new member to the solar system’s planetary family. I’m not talking about reviving Pluto’s status, but about a potential ...

European astronomers report the discovery of a second alien world in the TOI-1422 planetary system located some 500 light ...

Scientists have observed a “rogue planet” that is growing at an alarming rate as it gobbles up six billion tons of gas and dust every second, a new paper revealed. The newly studied object, formally ...

A newly discovered dwarf planet called 'Ammonite' (2023 KQ14) has been spotted in the outer solar system, and it could be another nail in the coffin for the Planet Nine hypothesis.

CLEVELAND, Ohio — The outer reaches of our solar system just got a little more crowded, with astronomers spotting a previously unseen moon circling Uranus. Using NASA’s James Webb Space Telescope, a ...

A new extreme trans-Neptunian object (ETNO), designated 2023 KQ14 (Ammonite), has been discovered, representing only the fourth known sednoid – a class of ETNOs with highly distant and elongated ...

Researchers, including Dr. Mark Showalter and Dr. Matthew Tiscareno of the SETI Institute, along with colleagues at the Space Telescope Science Institute (STScI), discovered a previously unknown moon ...