Who is Don Pettit? NASA’s 70-year-old ‘Space Grandpa’ who just came home after 220 days in orbit

NASA’s oldest active astronaut, Don Pettit, has returned safely to Earth after a seven-month mission aboard the ISS, landing in Kazakhstan on his 70th birthday. With this fourth spaceflight, Pettit’s total time in space now exceeds 590 days—the most by any American male astronaut.

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