List of Kepler's laws of planetary motion

This post is a list of Kepler's laws of planetary motion. Johannes Kepler published the first 2 laws in 1609 and the 3rd law in 1619. There are 3 laws listed below. Source: NASA

1. "Planets move in elliptical orbits with the Sun as a focus."
2. "A planet covers the same area of space in the same amount of time no matter where it is in its orbit."
3. "A planet's orbital period is proportional to the size of its orbit."