A rare total solar eclipse began in the Western state of Oregon Monday, as millions of people across the U.S. are watching the phenomenon from the Pacific to the Atlantic for the first time in 99 years.
Millions Across US Marvel at Total Solar Eclipse

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Kayley Terrez is lifted up to see the solar eclipse through a telescope as a large crowd gathers at the Griffith Observatory to watch the solar eclipse in Los Angeles, California, Aug. 21, 2017.

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This composite image, made from four frames, shows the International Space Station, with a crew of six onboard, as it transits the Sun at roughly five miles per second during a partial solar eclipse, Aug. 21, 2017 from , Northern Cascades National Park in Washington.

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Shadows from a near total solar eclipse are projected on a sidewalk as a pedestrian passes in midtown Atlanta, Georgia, Aug. 21, 2017.

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This composite image of nine pictures shows the progression of a partial solar eclipse near Banner, Wyoming, Aug. 21, 2017.