AT 470 MILES, Ranger's cameras show edge of the Sea of Clouds (left) with about as much detail as best pictures taken by biggest earth-based telescopes. Cross-shaped marks are reference points on the camera. Sunlight is falling from the left, casting shadows that permit measurement of elevations and depths. Areas between crater rims look smooth, but closer pictures (below) show this to be illusion. Fine spacing of TV lines gives pictures the quality of good photographs.
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