What is in the space between circling gnats and the fly

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There is a common analogy about the structure of an atom, such as the nucleus is a fly in the centre of a sports stadium and the electrons are tiny gnats circling the stadium (tip of the hat to 'The Greatest Show on Earth') however what is in the space between circling 'gnats' and the 'fly'?

Reference no: EM13679834

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