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At the end of this, Kelly will have a total of 522 days in space (adding on a day for accumlated hours spent), which will beat out Mike Fincke's total record of 382 days in space. Because he's been on a Hubble servicing mission, Kelly has also flown higher than a majority of astronauts since the Apollo era ended.
A one-year flight will just magnify that effect, he says We've never had an American in space for that long. â¦ We're entering a whole new realm.. On Friday, March 27, astronaut Scott Kelly will smash the U.S. endurance record for the longest continuous time in space. The one-year mission will provide NASA with invaluable data as his twin brother, Mark Kelly, undergoes the same tests on Earth. Sierra Oshrin.