Word: unknown
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Dates: during 1950-1959
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...noted that in spite of greatly expand areas of learning it would continue to be possible to respect and learn something of the "unknown provinces" beyond one's individual field. He emphasized this especially in regard to differences between the sciences and the humanities...
...them shows in the Palomar Mountain 200-inch optical telescope as a pair of galaxies, apparently in collision, hundreds of millions of light-years away. The new telescope men will attempt to show that fainter radio stars are also colliding galaxies. Since the radio waves created in some unknown way by such collisions penetrate much farther than light, they offer a means to investigate space much more deeply than optical telescopes...
...observed from one or a few places. Its surface is covered with rapidly moving fluids. Its atmosphere swirls with big and little storms. Its oceans are stirred by currents. Its solid crust shakes like jelly, and its plastic interior probably flows slowly in largely unknown ways. Influence? from the sun and beyond the sun affect the passive earth. Cosmic rays from the depths of space beat upon it, and meteors plunge like fireflies into its atmosphere. Its magnetic field fluctuates slightly; so does its gravitation. Scientists are sure that all these changes and influences are interconnected in intricate ways...
...UNKNOWN SOLDIER (316 pp.)-Voino Linna-Putnam...
...stars, they fell back on dead reckoning. By recording the ship's direction and its motion through the water, they tried to keep track of its position. The system did not work very well, chiefly because of crude instruments and because the effect of ocean currents was often unknown. But if a ship could have measured accurately its motion across the solid ocean bottom instead of the fluid surface, dead reckoning would have brought it to any harbor through the thickest...