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Pettit is now in the midst of his third stint on the International Space Station, and the decade he had to prepare for his current stay in orbit was put to good use. Accordingly, he is well stocked on cameras, lenses, and plans to make the most of six months in space to observe the planets and heavens from an incredible vantage point.

Dyson will speak at a free public lecture on Wednesday at UC Irvine. Between three missions, she has logged over one year of time living in space.

Nasa astronaut Suni Williams, one of two astronauts stuck on the International Space Station, has completed her first spacewalk since arriving.

One of NASA's two stuck astronauts is getting a change of scenery. Suni Williams stepped out on a spacewalk Thursday, her first since arriving at the International Space Station seven months ago.

"I was hoping that the kids saw someone who potentially looks like them that's a goofy, normal human being that got to do some extraordinary things."