Donald Roy "Don" Pettit is an American astronaut and chemical engineer best known for his orbital astrophotography and in-space inventions such as the Zero G Coffee Cup, which received the first ever patent for an object invented in space. He is a veteran of two long-duration stays aboard the International Space Station, one Space Shuttle mission and a six-week expedition to find meteorites in Antarctica. As of 2024, at age 69, he is NASA's oldest active astronaut.