US astronaut Peggy Whitson has officially broken the US record for cumulative time spent in space. As of 1:27 AM ET today, she had spent 534 days, 2 hours and 49 minutes in space -- a number that has obviously increased since then. But that amount of time spent in space broke the record previously held by Jeff Williams. Her current run on the International Space Station started on November 17th, 2016, and her mission was recently extended from March until September. By the time she returns to earth, she'll have accumulated more than 650 days in space. Whitson has also spent more than 53 hours outside the ISS doing spacewalks, a record for female astronauts.