WASHINGTON, Oct. 15 -- Christina Koch, who spent 328 consecutive days aboard the International Space Station and flew around the Moon on Artemis II in April, will not fly again. NASA said Tuesday that she will become its acting deputy chief engineer on November 1 and, with the appointment, move to management astronaut status, which makes her ineligible for future spaceflight assignments.

The announcement frames the move as a promotion. NASA Administrator Jared Isaacman said Koch "has seen NASA engineering from both sides of the equation," building complex systems on the ground and trusting them with her life in space. He credited her with helping lead Americans back around the Moon on Artemis II.

Koch was a mission specialist on that fl...