What shape are orbits of the planets how was the discovery of this orbit shape made?

The orbits of planets are elliptical in shape, with the Sun located at one of the two foci of the ellipse. This discovery was made by Johannes Kepler in the early 17th century, after analyzing the precise astronomical data gathered by Tycho Brahe. Kepler formulated his First Law of Planetary Motion, which states that planets move in elliptical orbits, revolutionizing the understanding of celestial mechanics and replacing the earlier belief in circular orbits.