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
Your guide to total, partial, and annular eclipses: what causes them, what you'll see, and when the next one will happen.
It's a banner year for sample return missions. In 2020, China, Japan, and the United States are all scheduled to have sample return missions in flight, seeking to retrieve material from near-Earth asteroids, the Moon, and eventually Mars.
The Planetary Society has a new improved guide to all the places we've landed—or crashed—on Mars, plus planned locations for the upcoming Perseverance, Tianwen-1, and Rosalind Franklin rover missions.
A group of researchers, backed by NASA funding, wants to use solar sails and the Sun's gravity to capture an image of an exoplanet so sharp we can see continents, oceans, and clouds.