Question

ANSWER IN ONE WORD

who used to observe the planet and calculate the motion.​​

Answer 1

Answer:

Kepler's Laws of Planetary Motion

While Copernicus rightly observed that the planets revolve around the Sun, it was Kepler who correctly defined their orbits. At the age of 27, Kepler became the assistant of a wealthy astronomer, Tycho Brahe, who asked him to define the orbit of Mars.

Explanation:

pls give me thanks

Answer 2

Answer:

Tycho Brahe's accurate observations of planetary positions provided the data used by Johannes Kepler to derive his three fundamental laws of planetary motion.

Explanation:

I HOPE THAT'S HELP YOU PLZ MARK MY ANSWER IN BRAINLIEST