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  • Mona Evans

    Why you can see a solar eclipse only from a small part of the Earth. The Moon is small compared to Earth, so its shadow is narrow. Any place where the darker part of the shadow (the umbra) falls has a total eclipse and within the outer part of the shadow (the penumbra) the eclipse is partial. ©Mona Evans, “Solar Eclipses” http://www.bellaonline.com/articles/art28395.asp

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