Training and selection
Selected candidates will train to operate on the lunar surface, live and work beyond Earth, and take on missions that push the boundaries of human exploration. Training includes spacewalking, lunar geology, and operations of high-performance aircraft. Astronaut candidates must pass NASA’s long-duration astronaut flight physical and demonstrate strong leadership, teamwork, and communication skills.
NASA expects to make its final selection in late 2027 to begin training as the next class of astronaut candidates.
"This is an extraordinary time to join NASA’s astronaut corps," said NASA Administrator Jared Isaacman. "The people we select could walk on the Moon, live and work at the Moon Base, and help pioneer the systems and operations that will ultimately carry crews to Mars."
The agency last opened applications in 2024. From more than 8,000 applications, 10 astronaut candidates were selected in 2025 and are currently completing nearly two years of training. Since the 1960s, NASA has selected 370 people to train as astronaut candidates. The agency has 32 astronauts active in the astronaut corps.