# What contributions did Brahe and Kepler make to astronomy?

**Kepler**worked out that the orbits of the planets were elliptical and got away from the old idea that they moved in circles and epicycles. The work of these two helped Isaac Newton to formulate his law of gravity. With this, we can calculate the position of any planet at practically any time.

Likewise, people ask, what is the contribution of Tycho Brahe in astronomy?

**Tycho Brahe** (1546-1601) was a Danish nobleman and **astronomer**, and he was one of the individuals whose work helped overturn that belief in favor of a heliocentric model of the universe, with the sun at the center.

Also Know, how did Kepler contribute to astronomy? Johannes **Kepler's** most influential accomplishments in **astronomy** were his three Laws of Planetary Motion, which were used by Isaac Newton to develop his theory of universal gravitation: -**Kepler's** First Law: The planets move in elliptical orbits with the sun at a focus.

Keeping this in consideration, what did Brahe and Kepler do?

**Kepler's** Laws of Planetary Motion At the age of 27, **Kepler** became the assistant of a wealthy astronomer, Tycho **Brahe**, who asked him to define the orbit of Mars. **Brahe** believed in a model of the Universe with the Sun (rayed disk) orbiting the Earth (black dot), but the other planets (symbols) orbiting the Sun.

What did Kepler steal from Brahe?

Tycho died the next year, **Kepler stole** the data, and worked with it for nine years. He reluctantly concluded that his geometric scheme was wrong. In its place, he found his three laws of planetary motion: I The planets move in elliptical orbits with the sun at a focus.