Space environment filled with danger from the meteorite and particles at high speed in space. Short wave radiation, and a charge from the Sun. In addition, in a space without enrolling factor life. Thus, the spacecraft must be armored escort vehicles and simulation environment, like on the surface world. Whether it's the temperature, pressure, humidity and chemical composition of the air. However, in the current era, the Earth gravity model. Spaceship in feeble condition. To adjust the space of human body and life to the feeble condition of training work in huge pool before it is sent to space: image 1.
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