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 enterprises.

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 largest, …

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 …

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

Nov 15, 2024 · From ripples in a pond to tesserae on a planetary surface, liquids tend to create similar patterns. This artwork from Planetary Society member Josh Martin is called “Earth’s Great Blue Spot.”

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.

Apr 11, 2025 · With a global community of more than 2 million space enthusiasts, The Planetary Society is the world’s largest and most influential space advocacy organization.

Mar 7, 2025 · The Planetary Society is deeply alarmed by reports that the White House will propose a 50% cut to NASA’s science activities in the upcoming agency budget request. Such a substantial …

Jan 30, 2025 · From funding early Mars rover testing to naming planetary bodies and developing sample return technologies, Planetary Society members have funded contributions to more than 20 missions …

For over 4 decades, our members have made strides in advancing planetary exploration, planetary defense, and the search for life beyond Earth. We have delivered tens of thousands of petitions to …