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NASA astronaut Christina Koch, a woman with short curly brown hair and glasses, floats inside a module of the International Space Station. She looks toward the camera with a slight smile, making an "OK" hand gesture while holding a long, thin metal instrument. Behind her is a wall of complex scientific equipment, including the Cold Atom Lab, with numerous wires and two laptops mounted upside-down.

Christina Koch Assist

Astronaut Christina Koch assists with a hardware upgrade for NASA's Cold Atom Lab aboard the International Space Station in January 2020.

Image Credit: NASA-International Space Station
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Image CreditNASA-International Space Station
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