23 historic missions in total (with an additional 6 separations) that are recognized for their notable achievements to various celestial bodies in our solar system with targets including the Sun, planets and their moons, comets and asteroids. Nearly every icon represents a specific robotic explorer (or series) with the exception of the Apollo program which continues to be the single human endeavor to ever go beyond the cradle.Link to t-shirt sizing and purchase page.
If you buy a copy we will donate $5 of every purchase to The Planetary Society. The world's largest space-interest group dedicated to inspiring the public with the adventure and mystery of space exploration. A non-governmental organization founded in 1980, who among its founders included Carl Sagan, the author of Cosmos.
(via the BB Submitterator)