Christina Koch

Josh Valcarcel, Public domain

American astronaut

Christina Hammock Koch is an American engineer and NASA astronaut. On her mission to the International Space Station in 2019–20 she was part of the first all‑female spacewalk and set the record for the longest spaceflight by a woman. On the Artemis II lunar flyby mission in April 2026, which set the record for human distance from Earth, Koch became the first woman to travel beyond low Earth orbit and to travel around the Moon.

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