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Sphere Examples

Spheres in nature range over 45 orders of magnitude, from the diameter of a proton to the diameter of the Universe itself.  Smaller useful dimensions than the proton have been utilized, all the way down another 22 orders of magnitude to the Planck length but specific instances of spheres in this range aren't identified.  Larger volumes than that of the Universe have been postulated but what these are and whether any of them represent spherical structures is not known.

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For our purposes, we concentrate on spheres that can be shipped covering about 10 orders of magnitude, with most examples concentrated on the higher side of our selected range.