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
The Earth is thought to be about 4.54 billion years old. Learn more about how it formed, and how we know when this all happened.
Spacecraft have been taking pictures of Mars from space since 1965. Here are some of our favorites.
On Nov. 1, 2023, NASA’s Lucy spacecraft flew past Dinkinesh, a small asteroid in the main belt, and discovered a binary pair of moonlets in orbit around the asteroid.
There aren't many close-up, high-resolution images of the ice giants Uranus and Neptune. The reason comes down to distance.