荒唐 发表于 2025-3-25 04:15:04
Thomas HockeyCombines the popular genres of scientific expeditions and the history of the American West.Explains in a nontechnical way the science and study of total eclipses of the Sun.Draws on previously unpubli规范要多 发表于 2025-3-25 09:17:37
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10: Surveying a Solar Eclipse, Sun. It did not discuss the United States Naval Observatory nor Nautical Almanac Office campaigns. Instead, it reported on the enterprise undertaken in part by USNO rival, the United States Coast Survey.哭得清醒了 发表于 2025-3-26 01:43:02
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Main Notions, Problems and Methods,On 6 August 1869, with a total eclipse of the Sun to occur in the local sky the next day, a local newspaper printed, “All of our readers, of course, know that an eclipse is an obscuration of one of the heavenly bodies by the interposition of another . . .” Did they? This is politic, but as unlikely to have been true then as it is today.Contracture 发表于 2025-3-26 20:18:54
Main Notions, Problems and Methods,Day began to become, if not night, deep twilight. With no electric lights, buildings were illuminated from within by lamp light.