His laws of planetary motion.
Tycho Brahe
There is no concrete evidence that Kepler stole Brahe's data. However, after Brahe's death, Kepler did gain access to his extensive observational data by working with Brahe's family as his successor. Kepler then used this data to formulate his laws of planetary motion.
Kepler used Tycho Brahe's precise observational data to formulate his three laws of planetary motion. These laws described the shape and speed of planetary orbits as ellipses and showed that planets move at varying speeds along their orbit. Kepler's calculations were based on observation and meticulous mathematical analysis, laying the foundation for modern celestial mechanics.
Kepler was one of the first to strongly push forward the idea of a heliocentric universe (the earth revolving around the sun). He worked closely with Tycho Brahe, even though the two men had many differences in ideologies they made enormous contributions to the field of astrology. Brahe had extensive records of astronomical observations which Kepler used to formulate the Kepler Laws for Planetary Motion. These laws were later used by Newton to develop theories of gravity. Kepler was notable mathematician and was always lauded for his mathematical knowledge and general intellect since childhood.
Johannes Kepler continued the work of Tycho Brahe while studying the elliptical paths of planets. After Brahe's death, Kepler inherited his extensive astronomical data and used it to formulate his three laws of planetary motion, which describe the elliptical orbits of planets around the Sun. Kepler's findings were pivotal in advancing the heliocentric model of the solar system.
Formulating is a verb. It's the present participle of 'formulate'.
I need to think how I can formulate a question using the word "formulate" in it.
Kepler used Tycho Brahe's precise observations to formulate his three laws of planetary motion. Kepler's laws demonstrated that the orbits of planets are elliptical, not circular, with the Sun at one of the foci of the ellipse.
There are lots of planets in the Kepler series. To answer your question, we need to know to which number Kepler you are asking about.
NASA's space telescope "kepler"
how did the student formulate it by drawing a conclusion
Lavoisier