Kepler was a brilliant thinker and a lucid writer, but he was a disaster as a classroom teacher. He mumbled. He digressed. He was at times utterly incomprehensible. He drew only a handful of students his first year at Graz; the next year there were none - Carl Sagan
A law explains a set of observations; a theory explains a set of laws. The quintessential illustration of this jump in level is the way in which Newton's theory of mechanics explained Kepler's law of planetary motion - John L Casti
It is important that in Kepler’s view the anima terrae is responsible for the weather and also for meteoric phenomena. Too much rain, for instance, is an illness of the earth - Wolfgang Pauli
Among the great men who have philosophized about the tides, the one who surprised me most is Kepler. He was a person of independent genius - Galileo Galilei
One wonders how many modern scientists faced by a similar situation in their work would fail to be impressed by such remarkable numerical coincidences - Fred Hoyle
Kepler was visited by a revelation that was to alter radically the future of astronomy - Carl Sagan
Kepler became interested in the action of the moon on the water, and in other occult phenomena, and similar childishness - Galileo Galilei
One of the first modern astronomers and last scientific astrologers - Carl Sagan
Fiercely competitive and prone to a certain amount of quarrelsomeness and violence - Albert Koestler
The first astrophysicist and the last scientific astrologer - Carl Sagan
the astrologer who killed astrology - Owen Gingerich
First to coin the common word “Satellite”
First to suggest that the Sun rotates about its axis
First to derive the birth year of Christ, which is now universally accepted
First to explain that all bodies to come together, with a force proportionate to their mass
First to correctly explain the first “natural laws”, which are universal, verifiable and precise
First to realize that the darkness of the night sky directly conflicts with the idea of an infinite universe filled with stars
First to formulate eyeglass designing for nearsightedness and farsightedness
First to describe: real, virtual, upright and inverted images and magnification
First to discover and describe the properties of total internal reflection
First to explain the process of vision by refraction within the eye
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 Galileosâ€™ works were all removed from the churchâ€™s â€œIndex of Forbidden Books.â€
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 fully address the cause of celestial motion, rather than the mere mathematical description of it
First to measure the distance to the stars using stellar parallax caused by the Earth's orbit
First to explain the use of both eyes for depth perception
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
Great is God our Lord. Great is His power and there is no end to his wisdom.
Nature uses as little as possible of anything.
God is in the Numbers.
Yes, I give myself up to holy raving.
The Earth is round, and is inhabited on all sides, is insignificantly small, and is borne through the stars.
I affirm and demonstrate that the movements of the planets are modulated according to harmonic proportions.
The Earth sings Mi-Fa-Mi, so we can gather even from this that Misery and Famine reign on our habitat.
I fear astrology is nothing but a dreadful superstition, so unlike astronomy which is a true science.
It may be well to wait a century for a reader, as God has waited six thousand years for an observer.
I much prefer the sharpest criticism of a single intelligent man to the thoughtless approval of the masses.