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Solar eclipse of August 7, 1869 ：ウィキペディア英語版

Solar eclipse of August 7, 1869

A total solar eclipse occurred on August 7, 1869. 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.
It path of toality was visible from eastern Russia, Alaska, across Canada, and the northeastern United States. A partial eclipse occurred across all of North America.
== Observations ==

In 1869, astronomer and explorer George Davidson made a scientific trip to the Chilkat Valley of Alaska. He told the Chilkat Indians that he was especially anxious to observe a total eclipse of the sun that was predicted to occur the following day, August 7. This prediction was considered to have saved them from an attack.〔(August 7, 1869, Astronomer impresses Indians with eclipse ) George Davidson, a prominent astronomer and explorer, impresses Alaskan Native Americans with his ability to predict a total solar eclipse.〕

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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