Karen Nyberg's job is out of this world, literally. She's been a NASA astronaut for fifteen years.
Her first trip to space was in 2008. "I remember after my first flight on the space shuttle Discovery … it was a 2 week mission, when I finished that it was more than I ever could have dreamed. It was a fantastic experience," Nyberg said in an interview with CNBC's "Power Lunch."
Nyberg returned to space in 2013; spending five and a half months aboard the International Space Station (ISS). "It's a laboratory like no other, so science can be done that just can't be done anywhere on earth," she said.