Sun-Moon Symmetry

“With the sun having a diameter of 1.4 million kilometers and the Moon having a diameter of a mere 3,474 kilometers, it seems almost impossible that the moon is able to block the sun’s light and give us around five solar eclipses every two years.How does it happen? Coincidentally, while the sun’s width is about four hundred times larger than that of the moon, the sun is also about four hundred times further away. The symmetry in this ratio makes the sun and the moon appear almost the same size when seen from Earth, and therefore makes it possible for the moon to block the sun when the two are aligned.”

http://listverse.com/2013/04/21/10-beautiful-examples-of-symmetry-in-nature/
http://earthsky.org/space/coincidence-that-sun-and-moon-seem-same-size

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