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

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

Although they are technically gas giants, Uranus and Neptune are referred to as "ice giants" due to their composition.

Uranus and Neptune may not be the icy worlds we’ve long imagined. A new Swiss-led study uses innovative hybrid modeling to ...

The cold and remote planets originally earned their label of "ice giants" to contrast their interiors from those of Jupiter ...

Researchers have uncovered evidence that Uranus and Neptune could be far rockier on the inside than anyone expected.

Astronomers used a telescope in Hawaii to find a new object on the outer edges of our solar system, helping to fuel evidence of a long-standing theory about Planet Nine, or Planet X. For years, ...

For generations, school posters have sorted the Solar System into tidy boxes: four small rocky planets near the Sun, two huge ...

Astronomers used a telescope in Hawaii to find a new object on the outer edges of our solar system, helping to fuel evidence of a long-standing theory about Planet Nine, or Planet X. For years, ...