Word: earths
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Dates: during 1940-1949
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...last of these, the grand finale, is an inspiring hunk of patriotism. "The Glorious Fourth," it is called, and the program says it is a Proud, Rousing, Heart-Clutching Tableau. It is Dedicated to the People of the United State and to All the Free Peoples of the Earth Who Place Their Faith In the Leadership of the President of Our Country in the Struggle to Maintain Their Way of Life Against the Menacing Hordes of World Aggressors. A nifty little sentiment, that. No circus nowadays is complete without...
...changes as the light passes through the dust clouds of space. Shapley looks at variable stars, which grow brighter and dimmer with a regular period. This period often depends on the absolute brightness of the star; when Shapley knows the absolute brightness and the brightness as seen from the earth, he can easily determine the star's distance...
Professors Bart J. Bok and Harlow Shapley are trying to map this huge disc-shaped "island universe," which includes the earth and every star that the naked eye can see. Both of them are measuring the distance to far-away suns, to determine their relative positions in the galaxy and thus the shape of the galaxy itself...
...regularly changes color. Only 20 of them are known, and to astronomers the varying spectrum suggests that millions of tons of calcium are changing into other chemicals. So far Deutsch has not found much--only that these stars are surrounded by strong magnetic fields; 5000 times greater than the earth...
From the cosmic dust, Whipple has drawn a theory on the origin of the earth-now probably the ranking theory among astronomers. He hypothesizes that the solar system was once all dust, and that the dust collected to form planets. And what, at first, drove the dust together? Not gravity, says Whipple, and not molecular attraction--but the seemingly insignificant push exerted by light beams, streaming out from...