How did kepler describe the planets' orbits

In an elliptical orbit with the sun at one focus of the ellipse.

Explanation:

This means that a planet's orbital shape is an ellipse or oval.

The planet follows the ellipse in its orbit, meaning that the planet to Sun distance is constantly changing as the planet goes around its orbit. Kepler's Second Law: the imaginary line joining a planet and the sons sweeps equal areas of space during equal time intervals as the planet orbits.