Erin Overcash, 34, is from Goshen, Kentucky, and Yuri Kubo, 40, is from Columbus, Indiana. He also stressed that the U.S. will win this second race to land astronauts on the moon. Only 370 people have been selected by NASA as astronauts, making it an extraordinarily small and elite group composed mostly of men. Anna Menon, who accompanied billionaire Jared Isaacman on a SpaceX flight last September, is NASA's first astronaut candidate to have already visited orbit. She'll be in good company at Johnson: Her husband, a former SpaceX flight surgeon, was chosen in NASA's last astronaut class.