In deep space, outside of Earth’s protective atmosphere, radiation increases the risk of cancer and damages the central nervous system, affecting motor function, cognitive function, and behavior, NASA’s Human Research Program said. Such high levels of exposure cause severe stomach issues, anorexia, cataracts, fatigue, cataracts, cardiac and circulatory diseases.
Space-suits and gear must be designed to keep people safe from space radiation.
Isolation and Confinement
When isolated and confined to small spaces for long periods of time, people develop behavioral issues.
Potential Mars colonists and crews will be traveling farther and longer than anyone ever has before. Scientists expect that there will be issues with cognition, depression, sleep disorders, morale. Future space travels may develop emotional problems, physical illnesses, and anger issues.
These flights require lots of preparation and can put people at-risk.
Distance and Gravity
Mars is 140 million miles from the Earth. If you run out of supplies you’re in trouble. There is no way to re-supply. Even being able to get the right nutrition is difficult. Meal planning is a vital part of the mission. And it’s a good idea to have some medical equipment, medications, and a trained med-staff on-board.
