Finding a planet is one thing; proving it is a planet when it has no star is the part that usually breaks the story. A newly characterized free-floating world now clears that hurdle with an unusually ...

On January 20, 2026, Saturn and Uranus make a sextile—a positive 60° angle between planets that encourages teamwork between ...

How far it is from the sun: 886 million miles (1.4 billion kilometers), on average How big it is: 72,400 miles (116,500 km) across, or almost 10 times the size of Earth. How many moons it has: At ...

Over the years, passing spacecraft have observed mystifying weather patterns at the poles of Jupiter and Saturn. The two ...

Look to the west-southwest after dark on Thursday, Jan. 22, to see a 17%-lit waxing crescent moon moving close to the ringed ...

Jupiter and Saturn's different polar storms reveal clues about planet interiors: Saturn has harder bottom than Jupiter.