Word: closed
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Dates: during 1950-1959
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...United States to change its ambassadors." To newsmen he added: "I have been thinking about it a great deal and I just figure the new government deserves a right start." Answered Eisenhower: "We all earnestly hope, as you do, that the people of that friendly country, so close to us in geography and sentiment, will through freedom find peace, stability and progress...
...best way to think of space as a navigable medium is to imagine the frictionless surface of a calm, glassy pond. Small objects drift across it easily, propelled by feeble forces. Scattered at wide intervals over the mirror surfaces are deep, sucking whirlpools. If a floating leaf drifts close to one of them, it plunges down to the bottom. A self-powered object, say a water insect, that gets sucked into a whirlpool has a terrible time battling back to the surface...
...that it will fall into the sun. Besides the comparatively small speed contributed by its own engine, it also has the earth's speed in its travel on its orbit. If the ship has only barely escape velocity, it will circle around the sun indefinitely on an orbit close to the earth's-just as bombs, in the newsreel pictures of a decade ago, seemed to hover in space just below the plane that released them...
...close is interplanetary voyaging? The great weight (2,925 lbs. of instrumented payload) of Sputnik III proved to the space-wise that the Russians had practically licked the initial problems of interplanetary flight. U.S. scientists reckon that the Soviets' Lunik, with only a little more speed, would have swooped past Mars and soared out toward the asteroids. George Paul Sutton, professor of aeronautical engineering at M.I.T., believes that present propulsion systems with a little refinement can send a space vehicle as far as Jupiter or even to Saturn, 750 million miles from the earth...
Controversial Moon. The moon is an exception. It is so close that it shows a wealth of detail that astronomers have studied for centuries. They have also argued bitterly over many questions presented by its serene face, e.g.: Are the ring-shaped craters the result of volcanic activity or meteor impacts...