Page:Popular Science Monthly Volume 89.djvu/693

 Is Jupiter Launchirif^ a Moon?

���The Great Red Spot on Jupiter's surface is not a fixture of the surface. It moves around. This is noteworthy from the fact that theory tells us that our moon, in its early stages of evolution, was carried round with the earth's axial motion, all the while just grazing the surface, its distance therefrom increas- ing through countless ages. The inference denotes a Jovian moon in embryo

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