NASA is studying how space impacts human health as part of its long-term goals to send astronauts to Mars. In the unique environment of space—with no gravity, fresh air, or sunlight—NASA explores how the body and mind respond. This research is critical to the Artemis program, which aims to send astronauts to the Moon and then Mars.

BulletsIn

• Space affects body: gravity loss, radiation, mental stress, poor sleep, immune weakening
• NASA studies this via Human Research Program, incl. Twins Study comparing astronaut vs. Earth twin
• Top risks: Radiation, Isolation, Distance, Gravity change, Hostile environment (RIDGE)
• Radiation can cause cancer, cataracts, heart disease; NASA uses shielding, detectors, simulations
• Isolation stresses mind; solutions: LED lights, VR, space gardens for mood/sleep support
• No gravity weakens bones, muscles; fluid shifts harm vision/balance; countered by suits, diet, exercise
• Mars travel = 20-min delay in help; astronauts must self-manage medical, tools, emergencies
• Closed spacecraft: clean air/water crucial; tested for germs, gases; constant health checks
• Lighting simulates Earth day-night for better sleep, less stress; designs support comfort, safety
• Artemis Moon missions gather live data to prep for long Mars journeys