re: #20 Charles

The really incredible part of a solar eclipse is that the moon is exactly the right distance from Earth to perfectly block out the sun in an eclipse.

A cosmic coincidence.

Only for this period of the Earth-Moon relationship. The Moon used to be closer to the Earth (initially 14,000 miles about 4.4 billion years ago) and eventually, over time there will be no more full eclipses as the Moon moves outward over time.