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Astronut

Joined 7 years ago from The Moon

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Man's conquest of space has required coping not only with a hostile environment but also with the effects of space travel itself. In leaving the earth, the space traveler leaves a dense, life-sustaining atmosphere and ascends through increasingly rarified air before entering the vacuum of space. During lift-off and reentry into the earth's atmosphere, his body is subjected to vibration and great forces of acceleration and deceleration. While traveling in space, his body is weightless. Also, the space traveler leaves the familiar social and physical environment of the earth and works in constant hazard, alone or in a small group, and is therefore subject to psychological stresses not encountered on earth. These and other factors must be taken into account to ensure his well-being.

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  • Education and Science (6)
  • Politics and Social Issues (1)
  • Principles of Space Flight
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    Principles of Space Flight

    11 months ago

    To accomplish the launching of even the simplest satellite into orbit around the earth, scientists must deal with several complex factors. These include the earth's gravitational attraction, the control of the satellite...

  • Hazards of Space Flight
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    Hazards of Space Flight

    11 months ago

    Man has evolved in the sheltered environment of the planet earth, where a dense atmosphere protects and sustains him. The environment in space, however, far from being protective, is extremely hostile. Its vacuum,...

  • Space Navigation, Guidance and Control
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    Space Navigation, Guidance and Control

    11 months ago

    The navigation system of a spacecraft determines both the position and the velocity of the vehicle. It may make these determinations by means of an internal inertial guidance system, radio signals transmitted from the...

  • Spacecraft Design
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    Spacecraft Design

    11 months ago

    The elements of design of a spacecraft are governed by its mission and operational requirements. Thus the wide panorama of different flight projects undertaken by the United States and the Soviet Union has resulted in...

  • Space Flight Achievements
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    Space Flight Achievements

    11 months ago

    The opportunity for achievements presented itself in the International Geophysical Year. The IGY was a program for international cooperation among meteorologists, geophysicists, and other scientists in obtaining...

  • One Giant Leap For Mankind...
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    One Giant Leap For Mankind...

    11 months ago

    Man's conquest of space has required coping not only with a hostile environment but also with the effects of space travel itself. In leaving the earth, the space traveler leaves a dense, life-sustaining atmosphere and...

  • The Apollo Programme
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    The Apollo Programme

    11 months ago

    In 1961 President John F. Kennedy announced that the United States would land a man on the Moon before 1970. The method chosen by the National Aeronautics and Space Administration was known as the "lunar-orbit...

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