What is a total solar eclipse?

Paul Doherty, a Sr. Scientist at The Exploratorium explains that a total solar eclipse happens when the moon moves precisely to cover the entire bright surface of the sun. Listen in as Paul Doherty describes the science of it all!

Paul Doherty, a Sr. Scientist at San Francisco's Exploratorium explains that a total solar eclipse happens when the moon moves precisely to cover the entire bright surface of the sun. Listen in as he describes the science of it all!

Click here for full coverage on solar eclipses.

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