Astronauts on the International Space Station (ISS) face several challenges. The microgravity environment leads to muscle atrophy and bone density loss, requiring regular exercise to mitigate these effects. Space sickness, caused by conflicting sensory information, can result in nausea and discomfort, though it usually subsides after a few days. The redistribution of bodily fluids can cause facial puffiness and sinus congestion. Additionally, astronauts are exposed to higher levels of ionizing radiation, increasing the risk of cancer and other health issues. Psychological challenges also arise from isolation and confinement, necessitating careful crew selection and support to maintain mental well-being.
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