Word: pulsion
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Dates: during 1960-1969
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...Apollo program has also received a boost from scientists at the Jet Pro pulsion Laboratory, who recently discovered the cause of unexpected variations in the altitude and speed of earlier unmanned lunar orbiters. Such flight deviations, which could drop a module several miles off target, were caused by local increases in lunar gravity brought about by areas of dense material beneath the five circular maria, or "seas." The concentrations of mass, called "mascons," may have been caused by the impact of large meteors, which generated enough heat to melt material below the surface of the moon and form regions...
...clouds of gases, the Venusian surface remains hidden even to the most powerful optical telescopes. Now, scientists are employing electronic means to explore the mysteries of the earth's sister planet. Using radio beams, Radar Astronomers Richard M. Goldstein and Shalhav Zohar of Caltech's Jet Pro pulsion Laboratory reported last week that they have mapped 160,000 sq. mi. of Venus, an area about equal to the size of the entire U.S. Northeast...
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