Kathleen Rubins Quotes
You absolutely know you're in space when you're doing a spacewalk. That was pretty interesting because you can feel vacuum. It actually changes your vocal cords because the pressure inside the suit drops quite a bit, so your voice feels different.
Citations
Rubins, Kathleen. "Expedition 48/49 Post-Flight Interview." NASA, National Aeronautics and Space Administration, 2 Nov. 2016.
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Kathleen Hallisey "Kate" Rubins is an American microbiologist and NASA astronaut. She became the 60th woman to fly in space when she launched on a Soyuz spacecraft to the International Space Station on July 7, 2016. She returned to Earth on October 30, 2016, aboard a Soyuz. She was a crew member of Expedition 48/49 and Expedition 63/64 of the International Space Station.