a Traveling Shadow - Last year's total eclipse of the Sun seen in 5 secondstigris-euphrates (25)in #eclipse2017 • 7 years ago Picture this shadow crossing North America next time. #solareclipse #totaleclipse
awesome
The one coming up on the 21st takes a completely different path. Knowing exactly where the shadow cone will be during each new upcoming solar eclipse was far beyond the abilities of astronomers for most of history.
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Interesting thoughts
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