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 three long-duration stays aboard the International Space Station, one Space Shuttle mission, and a six-week expedition to find meteorites in Antarctica. As of 2025, at age 70, he is NASA's oldest active astronaut and the third oldest person to reach orbit, behind John Glenn and Larry Connor. He has accumulated 590 days in space, behind only Peggy Whitson and Suni Williams.
Definition from Wikipedia – Donald Pettit