Solar system montage with eight planets

The Planetary Society

The Planetary Society has inspired millions of people to explore other worlds and seek other life. With the mission to empower the world's citizens to advance space science and exploration, its international membership makes the non-governmental Planetary Society the largest space interest group in the world.

Carl Sagan, Bruce Murray, and Louis Friedman founded The Planetary Society in 1980. Bill Nye, a longtime member of The Planetary Society's Board, serves as CEO. Learn more about The Planetary Society.

Latest Articles

SpaceX Inspiration4 mission: Your questions, answered

SpaceX is preparing to launch the first-ever entirely civilian mission — Inspiration4 — into Earth orbit.

Your impact: September equinox 2021

Members helped us send letters to the U.S. Congress asking for increased funding for NASA's planetary defense efforts.

Why space exploration is always worthwhile

A toolkit to help you advocate for the value of exploring space even when there are important problems to be solved here on Earth.