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By observationsBy observations which have been made on the spots on the moon, it has been ascertained that she always turns the same portion of her surface. the same hemisphere, towards the earth: whence it follows that the moon must, in each revolution round the earth, turn round upon herself in a plane parallel to the plane in which she moves. This phenomenon will be understood by an illustration: if a person walk round a tree, keeping his face continually towards it, he must, to do this, when he has walked round the tree, have at the same time turned completely round upon himself; this will be evident, if we reflect that in thus moving round the tree he will have seen completely round the horizon, to effect which, he must, of course, have turned himself completely round. Instead of revolving once in every twentyfour hours about MBT Shoes her axis, as our earth does, the moon revolves therefore once a month. Thus the lunar day is about fifteen days in length, and the lunar night fifteen days. In nineteen years there are to the inhabitants of the moon, only o nights anddays. The heat accumulated through each fifteen successive days of sunshine, and the cold produced by the radiation of this heat duringdays of continual night, must each be excessive, and each alternation of day and night present the miniature image of a season of fiery heat and of intense cold. Since the moon presents always the same hemisphere to the earth, and turns away always the same hemisphere or side of her surface from it, it is evident that the MBT earth can only be visible at any time from one half of the moon, the inhabitants of the other, if there be any, never seeing it, unless they pass the boundary which divides it from the first. To those inhabitants of the moon who can see the earth, it presents the appearance of phases like those which the moon presents to us, but on a far larger scale; first they see a crescent, thirteen MBT Sale times greater than that of the moon to us, then a half circle of corresponding dimensions, ana. lastiv. a ran oro. SDreaam?
