How long do you have to train to be astronaut?

Training to become an astronaut typically takes several years. Candidates generally undergo a rigorous selection process that includes a minimum of a bachelor's degree in a relevant field, professional experience, and physical fitness requirements. Once selected, astronauts complete about two years of intensive training, which includes simulations, technical skills, and physical conditioning, followed by ongoing training throughout their careers for specific missions. Overall, the journey to becoming an astronaut can take a decade or more, depending on individual backgrounds and mission assignments.