10. How is being in space different from being on Earth? (A K2S Question)

From The Space Library

The most noticeable difference between being in space and being on Earth is that in space you feel weightless and that makes moving around and working very difficult. If you are outside your spacecraft or space station, then you'll need a bulky spacesuit to keep warm and provide air to breathe. The spacesuit makes moving around hard as well. Since you feel weightless, in space you get less exercise. It may not seem this way to you, but here on Earth we are constantly exercising our muscles—even when we are sleeping or sitting down—because we are constantly resisting the pull of gravity, just by breathing. In space you would need to do exercises to keep those muscles in shape for your return to Earth and the effects of Earth's surface gravity.

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Answer provided by Luke Keller, Ph.D.

Question and Answer extracted from the book Kids to Space - by Lonnie Schorer

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