Jupiter, Saturn, Uranus and Neptune did not always have their current positions in the solar system. According to the ...

The interiors of Uranus and Neptune may be rockier than scientists previously thought, a new computational model suggests — challenging the idea that the planets should be called "ice giants." The new ...

(Ianm35/iStock/Getty Images Plus) The Solar System is one of the comforting constants of human existence. No matter what else ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A flyby of Uranus in 1986 is where we gathered much of our knowledge ...

Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The ...

Diamond rain? Super-ionic water? These are just two proposals that planetary scientists have come up with for what lies beneath the thick, bluish, hydrogen-and-helium atmospheres of Uranus and Neptune ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. When the Voyager 2 ...

Uranus wasn't ready for its closeup 38 years ago. I speak of the 7th planet from the Sun, and third largest in our solar system, which received a flyby — 50,000 miles above the planet — from the ...

Ancient Greek astronomers likely observed Uranus as a star, but limited tools and geocentric views kept them from recognizing ...