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In outer space, there is very little matter. It is a vacuum. The same is in our planet. The molecules are not completely condensed, so they move about in the empty vacuum. Even though there is much more matter here on Earth, there is still a vacuum present. The vacuum exists because of the structure of an atom. Atoms have an extremely small nuclei. If you made the nuclei the size of a soccer-ball, you would have to travel roughly 500 yards until you reached the nearest electron. All between that distance is empty space. In fact, if a human was condensed so that there was no empty space, we would be roughly 5% our original size!

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