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Your Role In Space Exploration
Starts Here

I'm In

Carl Sagan co-founded The Planetary Society to give you a role in space exploration.

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

Become A Member

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Space Advocacy 101

Learn how to be a top-performing space advocate

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Sharing and growing the passion, beauty, and joy of space exploration.


We Create

We fund innovative science and engineering projects to discover more about our planetary neighborhood and beyond.

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We Advocate

We guide space policy and work to ensure NASA has the funding it needs to explore new worlds and improve our own.

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We Educate

We reach out to people of all ages, inspiring them to understand the cosmos and equipping them with the tools to explore.

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"We're changing the world. Are you in?"
- CEO Bill Nye

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