December's faint Ursid meteor shower returns under dark skies, offering a small chance of unexpected activity.

A new study suggests that Uranus and Neptune may not be ice-rich planets after all. Researchers from the University of Zurich propose that these distant worlds could be dominated by rock, challenging ...

For decades, school posters and science museum displays have grouped Uranus and Neptune together as “ice giants,” a tidy ...

New simulations suggest Uranus and Neptune may contain far more rock than ice, offering fresh explanations for their unusual ...