Training and Preparation
Becoming an astronaut requires years of intensive preparation including underwater spacewalk practice, high-G force exposure, zero-gravity flight experience, language training, and emergency procedure rehearsals.
Daily Life on the ISS
Astronauts follow a structured routine including scientific research, station maintenance, two hours of mandatory exercise, and adapting to microgravity challenges in eating, sleeping, and personal hygiene.
Physical Effects
Extended spaceflight impacts the body through bone density loss, muscle atrophy, fluid shifts, vision changes, weakened immune system, and increased radiation exposure.
Psychological Challenges
Astronauts face unique psychological demands including limited personal space, separation from family, confined quarters, disrupted sleep cycles, and constant awareness of danger.