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 ...

The Hubble Space Telescope has peered at Uranus, left, and Neptune to study the so-called "ice giant" planets, but little is known about their interior composition. Credit: NASA / ESA / M. Showalter / ...

A team of researchers from the University of Zurich and the NCCR PlanetS is challenging our understanding of the solar system planets' interior. The composition of Uranus and Neptune, the two ...

Beyond the rocky planets in the solar system is an extensive area of cold, huge planets that are quite unlike Earth, as they all have incredibly thick atmospheres, extreme temperature fluctuations, ...

CAPE CANAVERAL, Fla. — Neptune’s far-flung moon Nereid may be the last of the plane t ’s original companions that managed to survive a cosmic crash, scientists reported Wednesday. Sixteen known moons ...