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The Time is Now.

As a Planetary Defender, you’re part of our mission to decrease the risk of Earth being hit by an asteroid or comet.


Support Other Planetary Projects


The Planetary Fund

Your support of The Planetary Fund powers our mission to explore worlds, find life, and defend Earth. You can support the entire fund, or designate a core enterprise of your choice.

lightsail 2 over Baja


The Society’s dream of solar sailing came true with the successful test flight of our LightSail 1 spacecraft. LightSail 2 launched aboard the SpaceX Falcon Heavy rocket on June 25, 2019. Join the Extended Mission Team and support this historic project!

Capitol building


Our Advocacy Program provides each Society member a voice in the process. Funding is critical. The more we have, the more effective we can be, translating into more missions, more science, and more exploration.

Earth and asteroid

Shoemaker Near-Earth Object Grant Program

The Planetary Society's Shoemaker Grant program supports amateur observers, observers in developing countries, and professional astronomers following up potentially hazardous asteroids.

Mat Kaplan and Enceladus

Planetary Radio

Each week, Planetary Radio visits with a scientist, engineer, project manager, astronaut, advocate or writer who provides a unique and exciting perspective on the exploration of our solar system and beyond. We hit the road now and then to produce a Planetary Radio Live show in front of an audience.

Other Ways to Give

Saturn and moons

Membership & Giving

Want to honor someone? Join the New Millennium Committee? Give stock or make a gift from your estate? You can support The Planetary Society, and space exploration, in the way that is best for you.

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Join The Planetary Society

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Join Our Journey

Have you been a member before? Renew your membership here.