Solar system montage with eight planets

The Planetary Society

The Planetary Society has inspired millions of people to explore other worlds and seek other life. With the mission to empower the world's citizens to advance space science and exploration, its international membership makes the non-governmental Planetary Society the largest space interest group in the world.

Carl Sagan, Bruce Murray, and Louis Friedman founded The Planetary Society in 1980. Bill Nye, a longtime member of The Planetary Society's Board, serves as CEO. Learn more about The Planetary Society.

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'Ignition': A new series of NASA initiatives

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Our newest member perk isn't just a cool piece of apparel — it's a reflection of the science of design.

The Planetary Society’s 2025 space gift guide

A collection of space-themed gifts for people of all ages.