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.

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

Our monthly feature focuses on easy and fun things to see in the night sky, including eclipses, supermoons, meteor showers, planetary conjunctions, and…

Mar 28, 2025 · But it is for moments like these that The Planetary Society exists. There is something innately human about joining together for a greater purpose, looking for meaning in the unknown, …

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, …

We bring planetary defense experts together from around the world to work on advancing solutions to the asteroid threat. We co-sponsor, attend, and organize activities at academic conferences, …

What’s up in the night sky: February 2026 Our monthly feature focuses on easy and fun things to see in the night sky, including eclipses, supermoons, meteor showers, planetary conjunctions, and more.

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 …

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Jupiter, our largest planet, teaches us how planetary systems evolve. Its four planet-like moons make it a planetary system of its own.