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The thin waning crescent Moon at dawn on August 20th 2017, on the last morning it could be sighted before the total eclipse on August 21st. The Moon has risen over the foothills and peaks of the Grand Tetons in Wyoming, USA, though this view is from the Idaho side looking northeast. (KEYSTONE/SCIENCE PHOTO LIBRARY/Alan Dyer/VWPics/SCIENCE PHOTO LIBRARY)