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American astronaut Marsha Ivins demonstrates the effects of microgravity on her hair in space. The effects of spaceflight on the human body are complex and largely harmful over both short and long term. [1] Significant adverse effects of long-term weightlessness include muscle atrophy and deterioration of the skeleton (spaceflight osteopenia). [2]
Psychological and sociological effects of space flight are important to understanding how to successfully achieve the goals of long-duration expeditionary missions. Although robotic spacecraft have landed on Mars , plans have also been discussed for a human expedition , perhaps in the 2030s, [ 1 ] for a return mission.
Virgin Galactic officials specifically cite the overview effect as a motivation for carrying people to the edge of space, to fundamentally change the way people think about their home world. [30] Critics note, however, that the space travel needed to personally experience the full overview effect, itself involves significant environmental ...
Each human being comes into the world alone, travels through life as a separate person, and ultimately dies alone. Coping with this, accepting it, and learning how to direct our own lives with some degree of grace and satisfaction is the human condition .
Homesickness is the distress caused by being away from home. [1] Its cognitive hallmark is preoccupying thoughts of home and attachment objects. [2] Sufferers typically report a combination of depressive and anxious symptoms, withdrawn behavior and difficulty focusing on topics unrelated to home.
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In the space (or microgravity) environment the effects of unloading varies significantly among individuals, with sex differences compounding the variability. [56] Differences in mission duration, and the small sample size of astronauts participating in the same mission also adds to the variability to the musculoskeletal disorders that are seen ...
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