Astronaut health is a field of research focused on the physical and mental well-being of individuals who travel to space. This area of study encompasses various aspects of astronaut health, including the effects of microgravity on the body, the impact of space radiation on health, the psychological challenges of isolation and confinement, and the development of countermeasures to mitigate health risks during space missions. Researchers in this field work to understand how space travel affects the human body and mind, and to develop strategies to ensure astronauts remain healthy and productive while in space and upon their return to Earth.