You're likely referring to Kepler's Laws of Planetary Motion, which describe the movement of planets around the Sun. Here's a breakdown:

Kepler's First Law (Law of Ellipses):

* Planets move in elliptical orbits with the Sun at one focus. This means the orbit is not a perfect circle but an oval shape.

Kepler's Second Law (Law of Areas):

* A line joining a planet and the Sun sweeps out equal areas in equal times. This implies that planets move faster when they are closer to the Sun and slower when they are farther away.

Kepler's Third Law (Law of Periods):

* The square of a planet's orbital period is proportional to the cube of the semi-major axis of its orbit. This means the farther a planet is from the Sun, the longer it takes to complete one orbit.

In simpler terms:

1. Planets don't orbit in perfect circles, but in slightly stretched out circles (ellipses).

2. They move faster when closer to the Sun and slower when farther away.

3. The time it takes a planet to orbit the Sun is related to its distance from the Sun.

These laws were revolutionary in understanding how planets move and paved the way for Newton's Law of Universal Gravitation, which explained the underlying force responsible for these motions.