All planets are made of gas, ice, rock and metal, and models of how planets form usually assume that these materials don't react chemically with each other. But what if some of them do? UCLA and ...

When NASA's Voyager 2 spacecraft made its way to outer regions of the solar system in the late 80's, it noticed something odd. Both of the ice giant planets, Uranus and Neptune, lacked what's known as ...

We actually know very little about what's going on inside Uranus and Neptune, causing researchers to propose that these planets be called "rocky giants" instead. Astronomers have long called Uranus ...

It's been one Neptunian year—or about 165 Earth years—since astronomers first observed the most distant planet from the sun.

They have missing "dipole magnetic fields." Here's why that's really weird. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. When NASA's Voyager 2 ...