In January 1986, NASA's Voyager 2 reached Uranus after traveling 1.8 billion miles over nine years. It took three years for Voyager 2 to pass Neptune as it made its way out of the solar system.

Some estimates suggest Uranus and Neptune may each have 50,000 times the quantity of water in Earth's oceans. But the authors of the new study say these models ignore the way the ice giants formed.

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. An image of Uranus on the left and Neptune on the right. (Image credit: Patrick Irwin) ...

Uranus and Neptune haven’t had a spacecraft visitor since NASA’s Voyager 2 mission more than 30 years ago. The study authors said that if a dedicated spacecraft were to orbit Uranus, it would ...

Uranus, the seventh planet from the Sun, is an enigmatic world that has perplexed astronomers with its extreme axial tilt of ...

Voyager 2/ISS images of Uranus and Neptune released shortly after the Voyager 2 flybys in 1986 and 1989, respectively, compared with a reprocessing of the individual filter images in this study to ...