Uranus

It's been decades since a spacecraft visited either Uranus or Neptune — which means scientists are busy dreaming up instruments that could be flown out on the next probe to these ice giants.

No spacecraft has gotten a close look at Uranus in more than three decades — but scientists know they want to go back, if they can design the right mission to do so.

Can you spot Uranus in this photo?

Solar systems are messy places, but the tools astronomers use to understand these systems can re-create that chaos with surprising beauty.

Uranus reached opposition on Oct. 23, and if you want to observe the frigid planet this week, look toward the full moon.

It turns out that Uranus is so weird because of a massive collision billions of years ago.

The clouds in Uranus' upper atmosphere are composed largely of hydrogen sulfide, the molecule that makes rotten eggs so stinky, a new study suggests.

NASA's Planetary Science Division Director, Jim Green, talks to NASA Goddard's Amy Simon, who studies the outer planets Uranus and Neptune.