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.
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
All the best moments so far from NASA's Perseverance rover, all in one place.
The Red Planet once had liquid water on the surface, and conditions that could have supported life.
Red dwarf stars are more common than our Sun. What are the prospects for life on exoplanets that orbit them?
How did our solar system come to be? Why are the planets, asteroids, comets, and other small worlds where they are now?