Astronomy
The Mechanics of Solar Eclipses and Their Historical Significance
Quick fact
The Sun is about 400 times larger than the Moon, but it is also about 400 times farther away, making their apparent sizes almost exactly equal in the sky—a cosmic coincidence that allows total solar eclipses.
Why this is interesting
Imagine the sky darkening in the middle of the day, stars appearing, and a glowing ring around a black sun. Why do these dramatic events happen so rarely, and how did people centuries ago predict them?