Where did we come from? Are we alone in the Universe? We can only answer these questions by exploring the planets and other worlds of our solar system and beyond. Learn why these worlds are so important, and how you can get involved.
Saturn's largest moon, Titan, is both the only other place in the solar system with liquid on its surface and the only moon with a thick atmosphere, making it a tantalizing destination to search for life.
What is a Planet?
It's right there in our name: The Planetary Society. But what is a planet? This seemingly simple question is the subject of much debate.Learn More
A flagship mission to the ice giants — Uranus and Neptune — will forever change our understanding of the origin and evolution of our solar system.
The chances of large impacts from asteroids and near-Earth objects capable of causing widespread damage on Earth are small — but they aren’t zero.
Humans have left many objects throughout space — whether it's archaeology or simply littering is up for debate.
After completing Mars Sample Return, Uranus should be the target of NASA's next major planetary mission, according to a major new report by the National Academies of Sciences.