Word: sun
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Dates: during 1990-1999
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POPULATION Americans moved from industrial cities of the Northeast to the Sun Belt of the South and West...
...perspective. A lot has happened since 1950. It has become clear that one of the great themes of the century has been the success of those who resisted authority in order to seek civil rights, decolonization and an end to repression. Along with this came the setting of the sun on the great colonial empires...
...took three years for astronomers to test this theory by measuring how the sun shifted light coming from a star. The results were announced at a meeting of the Royal Society in London presided over by J.J. Thomson, who in 1897 had discovered the electron. After glancing up at the society's grand portrait of Sir Isaac Newton, Thomson told the assemblage, "Our conceptions of the fabric of the universe must be fundamentally altered." The headline in the next day's Times of London read: "Revolution in Science... Newtonian Ideas Overthrown." The New York Times, back when it knew...
...careful and accurate of these experiments was carried out by Albert Michelson and Edward Morley at the Case Institute in Cleveland, Ohio, in 1887. They compared the speed of light in two beams at right angles to each other. As the earth rotates on its axis and orbits the sun, they reasoned, it will move through the ether, and the speed of light in these two beams should diverge. But Michelson and Morley found no daily or yearly differences between the two beams of light. It was as if light always traveled at the same speed relative...
...curved space-time was called general relativity to distinguish it from the original theory without gravity, which was now known as special relativity. It was confirmed in spectacular fashion in 1919, when a British expedition to West Africa observed a slight shift in the position of stars near the sun during an eclipse. Their light, as Einstein had predicted, was bent as it passed the sun. Here was direct evidence that space and time are warped, the greatest change in our perception of the arena in which we live since Euclid wrote his Elements about...