For decades, school posters and science museum displays have grouped Uranus and Neptune together as “ice giants,” a tidy label that suggests frozen, water-rich worlds lurking at the edge of the Solar ...

Uranus and Neptune may not be the icy worlds we’ve long imagined. A new Swiss-led study uses innovative hybrid modeling to reveal that these planets could just as easily be dominated by rock as by ...

For decades, Uranus and Neptune have carried the tidy label of “ice giants,” shorthand for worlds built mostly from frozen water, ammonia and methane. A new wave of modeling work is now challenging ...