Co-founded by Carl Sagan in 1980, The Planetary Society is a member-funded nonprofit organization dedicated to advancing space science and exploration through three core …

They established The Planetary Society to give anyone from anywhere in the world an active role in advancing space exploration. Today, The Planetary Society continues this work, under the …

We connect with planetary exploration experts from around the world to strengthen our work and support international exploration efforts. Our 50,000+ international membership makes us the …

Explore the membership options of The Planetary Society and join fellow space enthusiasts in advancing space science and exploration.

The latest stories from The Planetary Society, featuring humanity's quest to explore worlds, find life, and defend Earth.

A NASA team in the 1970s, headed by Planetary Society co-founder Louis Friedman, proposed a solar sail with a surface area of 600,000 square meters (6.5 million square feet), that would be …

Oct 14, 2025 · The Planetary Science Caucus, now in its second year, is officially reorganized and has hit the ground running; organizing against the devastating proposed cuts and rallying …

Jun 8, 2025 · No planetary spacecraft, space telescopes, or Earth science missions existed. The Apollo lunar program was nonexistent. Such was the NASA of 1961. And so now is the budget …

It operates the Chinese lunar and planetary exploration programs, organizes international collaborations, directs scientific research, and helps develop China’s space industry.

Together with our members and supporters, we’re on a mission to explore worlds, find life off Earth, and protect our planet from dangerous asteroids. Join us at planetary.org.