The topography of the moon's surface, which consists mainly of innumerable crater-like circles and arcs varying in size from several hundred miles across to less than is telescopically visible, is explained on a somewhat new theory by Colonel John Millis, army engineer and geologist, writing in Popular Astronomy. Rejecting the theory that the moon's features could be the product of volcanic action, he believes that the satellite was formed by a coalescence of masses coming together by mutual gravitation. If, then, meteors fell into the moon while the crust was cooling, they would...
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