A total solar eclipse happens somewhere on Earth once every year or two. What is an eclipse? Learn more about how solar eclipses happen, the four types of eclipses, and how to view the sun safely if you're within the path of totality.
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Eclipse map adapted with permission: https://www.exploratorium.edu/eclipse

Read more in "Solar eclipses, explained"
https://on.natgeo.com/2TT6aCc

Solar Eclipse 101 | National Geographic
https://youtu.be/cxrLRbkOwKs

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