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
Learn when we discovered lunar water, where it is, and how future missions will study it.
Are the moons of Uranus "relic" ocean worlds like Ceres or active ocean worlds like Enceladus? A proposed flagship mission aims to find out.
Astronomer Jane Greaves presents new findings that could support of phosphine in the clouds of Venus.
The enigmatic water-rich world in the inner Solar System could be set for a bold new NASA astrobiology mission.