The planetary laws you're referring to are likely Kepler's Laws of Planetary Motion. These laws describe the movement of planets around the sun and were developed by Johannes Kepler in the early 17th century.

Here's a breakdown of the laws:

* Kepler's First Law (Law of Ellipses): Planets orbit the Sun in elliptical paths, with the Sun at one focus of the ellipse.

* Kepler's Second Law (Law of Equal Areas): A line joining a planet to the Sun sweeps out equal areas in equal intervals of time. This means a planet moves faster when it's closer to the Sun and slower when it's further away.

* Kepler's Third Law (Law of Periods): The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit. This means planets farther from the Sun take longer to orbit than those closer to the Sun.

So, to answer your question, the planetary laws were propounded by Johannes Kepler.