The idea of floating about completely weightless sounds great fun, but try to imagine what it must be like to lose normal control of your body. Astronauts have to learn to live in these conditions, sometimes for months on end, because when they are in space their bodies become apparently weightless. Once a spacecraft is in orbit around the earth, it remains held in position by the earth’s gravity. The astronauts inside are moved by the same force, and since they and the spacecraft are moving in the same way, they are not drawn down to the floor but float about.
There is one curious side-effect of weightlessness which is encouraging to anyone who would like to be a little taller. Because their bodies are not pulled down to earth by the force of its gravity, astronauts find that they stretch a little in space. The effect does not last for long once they return to earth. Gravity soon pulls them back to their original height.
Picture Credit : Google
