Solar Eclipse

From Slackerpedia Galactica

What happens when a giant dragon attempts to eat the Sun or something.

If you ever find yourself in the midst of an eclipse, you should immediately stop whatever you're doing, go outside and yell at the sky to scare away the dragon. This is guaranteed to result in an eclipse-free Sun in a few minutes. (It will also result in the bemusement of everyone around you.)

For those of us in the 21st Century, it occurs when The Sun's apparent disk is partially or totally by the disk of The Moon. The Moon and the Sun have almost exactly the same angular diameter on the sky, so for a lucky few people on the Earth every year or so, the Sun's light temporarily gets blocked in what is usually considered a pretty awesome light show. Those of us outside the path of totality are typically totallitally bummed at missing out on the best show.

Eclipses only happen during New Moon, as it's got to be between us and the Sun. And it doesn't happen every New Moon either. And and and because the Earth is rotating all the while, it doesn't even appear on the same point on the Earth's surface every time.

There's supposedly a way to predict eclipses, but personally I think it's magic.