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
An overview of annular solar eclipses, how they work, what they're like to experience, and how to view one safely.
We asked two eclipse chasers for tips on how to plan your big moment in the Moon's shadow.
A list of useful words and terms relating to lunar and solar eclipses.
Know what to expect ahead of time, and be prepared to experience a cosmic spectacle like nothing else in nature.