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
While NASA will launch Dragonfly later this decade to Titan, another potentially habitable moon of Saturn, no space agency is currently funding a mission to Enceladus.
Astronomers are searching for exomoons, or moons orbiting exoplanets. Although this idea has been around for a while, astronomers have only recently started having success in finding these elusive worlds.
Why is our Moon's farside so different from its nearside?
A look back at when the Voyager spacecraft sparked a love affair with an ocean moon.