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.

What’s up in the night sky: March 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.

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.

Jan 21, 2026 · Designed for ages five through nine by Bill Nye and the curriculum experts at The Planetary Society, The Planetary Academy is a special membership subscription for kids and …

Dec 8, 2025 · Milky Way on the alpine tundra Planetary Society member Zaakary Barnes photographed this panorama of the Milky Way over Colorado’s Rocky Mountain National Park in June.

Nov 26, 2025 · Throughout 2025, The Planetary Society has featured over a dozen fantastic books that explore all facets of space exploration. From our monthly space book club picks to authors who …

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 15, 2026 · The top priority of the last two planetary science decadal surveys, sample return from Mars, is key to helping scientists better understand the geological and possible astrobiological history …