Kepler
3 laws' of planetary motion
Keplar figured out the laws of planetary motion using Tycho Brahe's data.
They all obey Kepler's 3 laws of planetary motion.
Johannes Kepler is credited with forming the mathematics of elliptical orbits.
According to Kepler's laws of planetary motion, planetary orbits are in the shape of an ellipse with the Sun at one of the foci.
"Eponymous" means "Same name". The laws of planetary motion were devised by Johannes Kepler, and are generally called "Kepler's Laws".
No. Kepler discovered the laws using Tycho Brahe's data.
His laws of planetary motion.
Johannes Kepler
I am not sure how much detail you want. But basically he explained Newton's three Laws of Motion, Newton's Law of Gravitation and developed Kelper's Laws of Planetary Motion.
Johann Kepler
He established the laws of planetary motion.