What did Johannes Kepler do?

Johannes Kepler was the founder of celestial mechanics and was the first person to design eyeglasses for near and far-nearsightedness. He made many other contributions to the field of science.

Kepler was born in 1571 and he grew up to become a prominent mathematician. During the 30-Years War, he was forced to seek refuge and he began working with an astronomer named Tycho Brahe. Kepler published several works during his lifetime, including "Stereometrica Doliorum" which revolves around integral calculus. Kepler was also the first person to explain to the scientific world that the moon affects the tides. He also came up with the year Christ was born.