Astronaut health is a critical aspect of space missions, focusing on the physical and mental well-being of astronauts. In microgravity, astronauts experience changes such as muscle atrophy, bone density loss, and fluid shifts, which can affect their overall health. Regular exercise and a balanced diet are essential to mitigate these effects during long-duration missions. Mental health is also a priority, as isolation and confinement can lead to stress and anxiety. NASA employs various strategies, including psychological support and communication with family, to help astronauts cope. Monitoring health through regular check-ups ensures that astronauts remain fit for their missions in space.