Kepler's mother was a drug dealer, he spent the later years of his life defending his mother against charges of witchcraft which he had seeded with his "fictional" book the Somnium.
Kepler got kicked out of Austria for failing to convert to Roman Catholicism. This gave him the chance to get a job with Tyco Brahe in Prague.
Kepler was a terrible teacher, not a single student wanted to take his classes, but he continued providing lessons for a whole year with no students present.
Kepler was born into the lowest social class of Germany in 1571. Kepler was a sickly child, being extremely nearsighted, having skin problems and nearly dying of Smallpox when he was just four years old.
Kepler's extreme fear of taking a bath. It was his first wife who finally forced him into taking one, in 1605, 8 years into their marriage; Kepler thought it a very unpleasant experience.
Kepler's health problems made his calculations more difficult, as most were made while he was standing up, as he suffered from a severe case of hemorrhoids.
When it finally became clear that the church was wrong, Copernicus, Kepler, and Galileos’ works were all removed from the church’s “Index of Forbidden Books.”
Kepler spent two years "evaluating" eleven potential brides before eventually choosing one after his first wife had sadly died of cholera in 1611.
First to realize that the darkness of the night sky directly conflicts with the idea of an infinite universe filled with stars
First to fully address the cause of celestial motion, rather than the mere mathematical description of it
First to explain that all bodies to come together, with a force proportionate to their mass
First to coin the word "Satellite"
First to suggest that the Sun rotates about its axis
First to measure the distance to the stars using stellar parallax caused by the Earth's orbit
First to discover and describe the properties of total internal reflection
First to describe: real, virtual, upright and inverted images and magnification
First to explain the use of both eyes for depth perception
First to formulate eyeglass designing for nearsightedness and farsightedness
First to explain the process of vision by refraction within the eye
First to name and investigate the formation of pictures with a pin hole camera
First to explain that the tides are caused by the Moon
First to explain the principles of how a telescope works
First to derive logarithms purely based on mathematics
First to correctly explain planetary motion, thereby, becoming founder of celestial mechanics
First to derive the birth year of Christ, which is now universally accepted.
First to write a work of science fiction
First to correctly explain the first "natural laws", which are universal, verifiable and precise