How the planets move

As i sit viewing the stars through my telescope, I think of a way to describe the Planetary Motion. I have came up with three laws to describe Planetary Motion. In my first law of planetary motion I discuss how the Planets move in ellipses with the Sun in focus. As I studied the planets and sun rotating, I realized Circular and Elliptical orbits having the same period and Focus. I have tried to calculate the position of Earth in it's orbit and came to the conclusion of my second law. The second law of "Planetary Motion" is the radius vector describes equal areas in equal times. Both of these laws are published in my book "Astronomia Nova" which students at Bishop Feehan high school have viewed, like Kelcey Martin. The third law discusses how the squares of periodic times are to each other as cubes of the mean of distance. However, this law is published in my book Harmonices Mundi. This law also aided Newton in his law of gravitation.