In his off-duty time, NASA Astronaut Don Pettit experiments with the physics of
water in the weightless environment aboard the International Space Station. Published as a collaboration between NASA and the American Physical Society. Find more of these amazing videos in the following playlist.
Donald Pettit
Donald Roy Pettit (born April 20, 1955) is an American astronaut and chemical engineer best known for his orbital astrophotography and in-space inventions such as the Zero G 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 (with a third stay currently underway), 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.
Definition from Wikipedia – Donald Pettit