Satellites of giant planets thought to form in gaseous circumplanetary disks (CPDs) during the late planet-formation phase, but it was unknown so far whether smaller mass planets, such as the ice ...

Rare planetary pairing: JWST studied TOI-1130 b, a mini-Neptune orbiting inside a hot Jupiter’s path, a configuration once thought nearly impossible. Heavy atmosphere clue: Water vapor, carbon dioxide ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The planet, about ...

A bizarre planetary pairing 190 light-years away is challenging everything astronomers thought they knew about how worlds form. A “lonely” hot Jupiter — typically found without nearby companions — is ...

A giant planet was supposed to have the place to itself. Instead, in a star system 190 light-years away, a hot Jupiter shares ...

A study suggests the ice giants Uranus and Neptune aren't quite as watery as previously thought. They may also contain huge amounts of frozen methane, potentially solving the puzzle of how they formed ...

Images taken by the Hubble Space Telescope document the formation of a Great Dark Spot on Neptune for the first time, report researchers in a new study. Like Jupiter’s Great Red Spot, Neptune’s Great ...

Uranus and Neptune are the outermost planets of the solar system. In size, possibly bulk composition, and their large distance from the Sun they are similar and clearly segregated from the inner ...