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Lk98r TIL the NASA cameras that tracked Apollo rockets were built off of M-45 quadmount anti-aircraft gun systems
mx6Mo TIL in 1997 Russia tried manually docking a supply vessel to the Mir space station using only a handheld laser range finder, stopwatch, and remote control joysticks. It went badly, but visiting NASA astronaut Michael Foale managed to save Mir by MacGyvering sailing technique with physics knowledge.