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.

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 …

Find your representative and get step-by-step instructions for filling out congressional appropriations request forms supporting NASA Science in FY 2027.

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

Jan 26, 2026 · The Planetary Society remains an independent, member-funded nonprofit with a global reach, advocating for space exploration, advancing science and technology, and engaging the public …

Feb 11, 2026 · Tony studies planetary materials, especially moon rocks and lunar regolith, to understand how planets form and how they change over time and where those key ingredients, like water, may …

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 …

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.

Sep 3, 2025 · In response to unprecedented proposed budget cuts to NASA Science programs, The Planetary Society and a coalition of our allies and partners are organizing a special day of action to …