Susan’s Almanac Project for December 27, 2018
(Please note: this post originally ran on December 27, 2017.) It’s the birthday of one of the rock stars of astronomy, Johannes Kepler, born in 1571 in Weil der Stadt, Wuerttemberg, in the Holy Roman Empire of German Nationality. You may know him from such hits as Kepler’s First Two Laws of Planetary Motion (Astronomia [...]