TIL the sun and moon appear to be the same size in the sky because of an astonishing coincidence: the moon is 400 times smaller but 400 times closer.

http://www.mentalfloss.com/article.php?id=30901



Submitted February 27, 2015 at 07:49AM by garglemymarbles http://www.reddit.com/r/todayilearned/comments/2xb1s4/til_the_sun_and_moon_appear_to_be_the_same_size/