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What determines the length of totality during a solar eclipse? | Astronomy.com

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What determines the length of totality during a solar eclipse?

FROM THE July 2012 ISSUE

What determines the length of totality during a solar eclipse?

Richard Vaun, Holley, New York

Published: Tuesday, May 29, 2012

Totality occurs within the Moonт??s shadow, as cast by the Sun, falling onto Earth. So, because the Moon moves at different speeds in its orbit around Earth and the planet moves at different speeds
in its orbit around the Sun, the shadow sweeps through space at differing rates.