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.

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 provide free, accessible information to the public like our weekly radio program and podcast Planetary Radio, videos, articles, social media, The Planetary Report magazine, public events, and …

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.

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 …

Jan 30, 2025 · The Planetary Society has served many times as an official education and outreach partner for space missions, oftentimes in the form of collecting names, sending messages aboard the …

Through it all, The Planetary Society has been a champion of exploration, ensuring missions get the funding they need and that the public knows about the discoveries they make.

What’s up in the night sky: January 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 1, 2026 · Feb. 28: Planetary alignment. Six planets — Mercury, Venus, Jupiter, Saturn, Uranus, and Neptune — will trace an arc across the night sky, though some (Venus, Jupiter, Saturn) will be much …