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Please explain why the total solar eclipse in August 2017 starts on the west coast and progresses eastward.

Jeff Panther, Tucson, Arizona
RELATED TOPICS: SOLAR ECLIPSE | ECLIPSE QUESTIONS
2017 solar eclipse path
At first glance, this seems counterintuitive. After all, doesn’t everything in the sky rise in the east and set in the west? Yes, but that’s an apparent motion caused by Earth’s real motion of spinning once a day on its axis. Because our planet rotates from west to east, everything in the sky seems to be going in the other direction.

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