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PHILADELPHIA (CBS) — A female astronaut holds the United States record for most cumulative time in space.

Now, she’s retiring.

NASA Astronaut Peggy Whitson’s career began in 1986.

She started out as a research associate at the Johnson Space Center in Houston.

She’s been a part of three long-term missions at the International Space Station and has spent 665 days in space, a record for United States astronauts.

It’s not the only one she holds.

She also set the record for most spacewalks by a woman among others.