Man in Space

Man in Space

. Astronaut Donald Peterson, on a 50-foot tether line during his 4-hour, 3-orbit space walk, moving toward the tail of the Space Shuttle Challenger as it glides around the Earth. Hundreds of miles above the Earth, there is no air and an astronaut must wear a space-suit. It supplies the oxygen he needs and insulates his body from extreme heat or cold. However, a space-suit cannot protect an astronaut from energetic particles hurled out from explosions on the Sun. He or she must then be within the protective shielding of a spacecraft or other shelter to avoid the danger. (Courtesy of NASA.).

Copyright 2010, Professor Kenneth R. Lang, Tufts University