Word: craters
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Dates: during 1960-1969
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...when it was flashed unexpectedly onto a screen at a meeting of the American Institute of Aeronautics and Astronautics in Boston last week, sophisticated space scientists and engineers recognized the terrain immediately. It was a spectacular closeup shot of lunar landscape. That photograph of the moon's Crater of Copernicus, said NASA Scientist Martin Swetnick, is "one of the great pictures of the century...
...confirm his theory that the 1,000-ft.-high mountains in the center of Copernicus were partially formed by volcanic activity. Scattered over their slopes, he says, are humps similar to the cinder cones found on major terrestrial volcanoes. The picture also clearly shows that the floor of the crater is remarkably flat. To Kuiper, this indicates that the subsurface was once in a fluid or plastic state, and that it solidified, causing the crater floor to level...
...tons, had a nucleus ten miles in diameter, and crashed into the moon at a speed of 35 miles per second. The explosion produced by the stupendous collision was intensified by the comet's high content of ice expanding into steam on impact. The resulting blast produced a crater 60 miles across and at least two miles deep; it hurled pulverized debris hundreds of miles in all directions...
...discovery of Hawaii's untapped fluid assets was made by University of Michigan and U.S. Geological Survey scientists while they were charting temperature variations in the vicinity of Kilauea, the island's largest volcano crater. In an old B-25 bomber crammed with infra-red scanning equipment, they mapped the volcano's hot spots; then they enlarged their thermal survey by following two great rifts that led from the crater to the sea. Under the shore, and in nearby coastal waters, their infra-red detector revealed just the opposite of what they were searching for: large areas...
Snapped from 133 miles away, the orbiter's first pictures showed the crater-pocked flatlands and adjacent ridges of the Mare Smythii region on the right-hand rim near the lunar equator. Later, the spacecraft snapped a 930-mi.-high shot of the moon's mysterious back side. Even so, the strong picture signals from the high-resolution lens were extremely fuzzy, primarily because of difficulties in the spacecraft's camera system...