Second is the best

Ok, so second isn't necessary the best. Coming up with clever titles is difficult, alright? I'm an astronomer, not a poet. The point is, today I am going to provide you with an explanation of the second law of planetary motion. Excited? You should be. Let's get started.
The second law of planetary motion is called the Law of Equal Motion. I shall begin by stating the law.
An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time.

Above, you can see how the planet moves around the sun. Notice how when the planet is closet to the sun, it moves more quickly than when it is farther away. Nevertheless, the area of each sweep and the time of each interval is the same no matter where the planet is on its orbit.


Well, that was quick, wasn't it? I might even have time to catch that special about White Dwarfs on the Discovery Channel! Until next time,
Johannes Kepler