Planetary Society logo
  • “Exploration is in our nature.” - Carl Sagan
Planetfest 21 logo

Join Bill Nye and leading experts in a virtual festival celebrating the next era of Mars exploration!

Get Tickets

Featured Stories

Articles

NASA Solar Sails Build on LightSail 2

Planetary Radio

‘Oumuamua: Avi Loeb says it may have been artificial

Articles

Solar System History 101

Support Our Core Enterprises

Your Planetary Fund support powers our mission to explore worlds, find life, and defend Earth.

Donate Today

The LightSail 2 Mission

LightSail Updates

LightSail 2 Enters Extended Mission Phase

LightSail Home

The LightSail Mission

Donate

Support the 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.

Become a member

Please accept marketing-cookies to watch this video.

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

lightbulb

Educate

We expand public knowledge about space.

Learn More
megaphone

Advocate

We shape space policy and fight for future exploration.

Learn More
rocket

Innovate

We invest in innovative space science and technology.

Learn More
hands holding earth

Collaborate

We cultivate a worldwide movement for space.

Learn More
people at launch event

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

Sign up for email updates