A new computational model suggests that Uranus' and Neptune's cores may be less icy than their "ice giant" nickname suggests.

For decades, Uranus and Neptune have been filed neatly into the “ice giant” drawer, shorthand for worlds built mostly from ...

WASHINGTON, April 11 (Reuters) - Frigid and far-flung Neptune, our solar system's outermost planet, is adding to its reputation as an enigmatic world, with astronomers puzzled by a surprising drop in ...

WASHINGTON (Reuters) - Frigid and far-flung Neptune, our solar system's outermost planet, is adding to its reputation as an enigmatic world, with astronomers puzzled by a surprising drop in its ...

The cold and remote planets originally earned their label of "ice giants" to contrast their interiors from those of Jupiter and Saturn, the so-called "gas giants" rich in hydrogen and helium. Uranus ...

Neptune, the eighth planet from the Sun – The Distant Planet. This bright blue orb hanging out near the edge of the solar system has garnered intrigue from sky watchers and scientists alike. Like its ...

New models suggest Uranus and Neptune may hold far more rock than expected, raising questions about how these distant planets formed.

Take the chance in September to get outside and gaze at planets. Neptune is in full opposition this month, and while Saturn's full opposition happened earlier this month, it's still visible if you ...

You don’t really hear about Neptune, do you? Not as often as the other planets, certainly. Space robots regularly provide snapshots of the surface of Mars and the clouds of Jupiter. Mercury is a ...

Astronomers have unexpectedly discovered the heaviest Neptune-like planet yet — one more than four times the mass of our solar system's Neptune — yet it remains a mystery how the world might have ...