What We Do

• Explore Worlds
• Find Life
• Defend Earth

How We Work

• Education & Public Outreach
• Space Policy & Advocacy
• Science & Technology
• Global Collaboration

Our Results

• Our Impact

  Learn how our members and community are changing the worlds.

• LightSail

  Our citizen-funded spacecraft successfully demonstrated solar sailing for CubeSats.

Space Topics

• Planets & Other Worlds
• Space Missions
• Night Sky
• Space Policy
• For Kids

Learn

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The Planetary Report

The Moon Issue

Celebrating our celestial companion. Image by Andrew McCarthy.

Get Involved

• Become A Member

  Membership programs for explorers of all ages.

• Email Signup

  Get updates and weekly tools to learn, share, and advocate for space exploration.

• Action Center

  Volunteer as a space advocate.

Support Our Mission

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The Planetary Fund

Accelerate progress in our three core enterprises — Explore Worlds, Find Life, and Defend Earth. You can support the entire fund, or designate a core enterprise of your choice.

About Us

• Overview
• Strategic Framework
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• Careers
• Contact Us
• Our Story

The Planetary Society

Our Vision

Know the cosmos and our place within it.

Our Mission

Empowering the world's citizens to advance space science and exploration.

Membership

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• Contact Us