Explore Worlds
Find Life
Defend Earth
NASA SCIENCE IS UNDER ATTACK
The science program is facing a staggering 47% budget cut in 2026, undermining decades of exploration. Your voice is critical.
Featured Stories
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.
Join CEO Bill Nye and become a member of the world’s largest and most effective space advocacy movement.
Featured Fundraising Campaign
Earth's first line of defense
Support the team of astronomers defending Earth today and your gift will be matched up to $25,000.
Donate
Space Policy & Advocacy
Where we stand on the issues
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.
Learn More
Get More Space
Sign up for updates, weekly tools, and exclusive opportunities to support space exploration. You may opt out any time. View our Privacy Policy.