German astronomer Johannes Kepler was born in December 1571, and throughout his 59 years of life, he contributed immensely to science. He is most well-known, however, for his three laws of planetary ...

Before Johannes Kepler’s Third Law, the motions of the planets around the Sun were a mystery. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

In Astronomy’s 2022 list of the 20 greatest astronomers of all time, Associate Editor Michael Bakich put Johannes Kepler, born Dec. 27, 1571, in Germany, at No. 3. He was ranked behind only his ...