Abstract: Living in space is not the same as living on Earth. Many things are different. Our body will get change in space. There are many problems which encountered over the astronauts body. We can not say the age of Earth. The day will come when some human being will spend all their time in space. But we have to know the problems which can affects in our body if we spend for a long or short time in space. Astronauts have done over 200 spacewalks outside of the International Space Station and gave their different views. But the common thing they shared that there is a huge difference between spending time in zero gravity and on Earth.
Keywords: Bone demineralization, Cardiovascular changes, Immunological changes, NASAs Life Support System, Nutrition in Space, Physiological changes in Space, Space environment, Space Medicine