After nearly a year in space, astronaut Scott Kelly is ready to return home.
Kelly is heading back to Earth on Tuesday after spending the last 340 days on the International Space Station.
He has set the American record for the longest duration in space. He has also set a record for the most cumulative time in space. With all of his trips combined, he has spent 520 days in orbit.
NASA will study the effects of space on him to prepare for future missions.
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