NASA
NASA, the amazing National Aeronautics and Space Administration, is the U.S. government agency that handles all things space and aeronautics. It's been around since 1958, taking over from the National Advisory Committee for Aeronautics (NACA).
And guess what? For all you space enthusiasts out there, you can find awesome NASA merch, mugs, and comfy hoodies to show your love for the agency! Buy licensed clothes from a nasa shop in Europe.