Advance space exploration

Learn about our mission to increase discoveries in our Solar System, elevate the search for life beyond our planet, and decrease the risk of Earth being hit by an asteroid.

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Find your place in space

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.

Explore Worlds

Increase discoveries about the worlds of our Solar System and beyond.

Find Life

Elevate the search for life as a space exploration priority.

Defend Earth

Decrease the risk of Earth being hit by an asteroid or comet.

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Join CEO Bill Nye and become a member of the world’s largest and most effective space advocacy movement.

Featured Fundraising Campaign

Support our core enterprises

Your gift today will go far to help us close out the year strong and keep up our momentum into 2026.

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Mars sample return, increasing NASA science funding, advocating for NEO Surveyor, flexibility for Artemis procurement and partnerships, and elevating the search for life beyond Earth. Together we’re active in advancing space science and exploration.

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