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

• Articles
• Planetary Radio
• Space Images
• Videos
• Courses

The Planetary Report

Ocean Worlds

Exploring the watery planets and moons of our cosmic neighborhood.

Get Involved

• Action Center

  Volunteer as a space advocate.

• Become A Member

  Join fellow space enthusiasts in advancing space science and exploration.

• Email Signup

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

Give

• Renew Membership
• Support A Project
• Shop to Support
• Travel
• Other Ways to Give

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
• News & Press
• 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.