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Forty years of space for everyone

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Join Our Mission to Defend Earth

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

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The LightSail 2 Mission

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

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

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

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Educate

We expand public knowledge about space.

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Advocate

We shape space policy and fight for future exploration.

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Innovate

We invest in innovative space science and technology.

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Collaborate

We cultivate a worldwide movement for space.

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

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