Advance Space Exploration
We need 500 new members by March 5. Are you in?Become A Member
Support Our Core Enterprises
Your Planetary Fund support powers our mission to explore worlds, find life, and defend Earth.Donate Today
The LightSail 2 Mission
Carl Sagan co-founded The Planetary Society to give you a role in space exploration.
Join CEO Bill Nye and the world’s largest and most effective space advocacy movement.Become a member