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My Moon

August 11, 2009

The Sun happens to be 400 times the Moon’s diameter, and 400 times as far away. That coincidence means the Sun and Moon appear to be the same size when viewed from Earth. A total solar eclipse, in which the Moon is between the Earth and Sun, blocks the bright light from the Sun’s photosphere, allowing us to see the faint glow from the corona, the Sun’s outer atmosphere.

Big_Moon_revised

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