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Solar eclipse of October 27, 1780 ：ウィキペディア英語版

Solar eclipse of October 27, 1780

A total solar eclipse occurred on October 27, 1780. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide.
==Observations==

During the American Revolutionary War, the first American solar eclipse expedition was organized and sent out from Harvard College in Massachusetts. A special immunity agreement was negotiated with the British to allow the scientists to work unharmed. The Harvard expedition, after all their efforts, missed the eclipse because they chose a site outside the path of totality. Modern analysis of this embarrassing incident for embryonic American science blame Samuel Williams for miscalculating the path of totality.〔(ECLIPSES IN HISTORY ) by Ken Poshedly〕〔(Where did the 1780 eclipse go? ) Science Frontiers #22, JUL-AUG 1982. William R. Corliss〕

抄文引用元・出典: フリー百科事典『ウィキペディア（Wikipedia）』
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