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Kepler

Excerpt from Kepler

In comparison with the question of the motion of the earth, no other astronomical detail of the time seems to be of much consequence. Comets, such as from time to time appeared, bright enough for naked eye observation, were still regarded as atmospheric phenomena, and their principal interest, as well as that of eclipses and planetary conjunctions, was in relation to astrology. Reform, however, was Obviously in the air. The doctrine of Copernicus was destined very soon to divide others besides the Lutheran leaders. The leaven of inquiry was working, and not long after the death of Copernicus real advances were to come, first in the accuracy of Observations, and, as a necessary result Of these, in the planetary theory itself.

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64 pages, Hardcover

First published January 1, 1920

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About the author

Walter William Bryant

17 books3 followers
British astronomer and author

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Displaying 1 - 4 of 4 reviews
Profile Image for Brandon Meredith.
120 reviews18 followers
January 2, 2025
Honestly, this is a remarkable story. Kepler was one among a handful of men that invented science during the Scientific Revolution of the 16th and 17th centuries. And it’s quite shocking to see how beholden he was (and the others were) to magic, mysticism, and religion. It’s almost unbelievable that they could have shuffled off that snake skin to give us the scientific method.

Also, Kepler’s three laws of planetary motion were amazing. He was the first one to describe their motion as elliptical! In 1609! Astronomers had been working on that for literal millennia! He just needed Tycho Brahe’s 20 years of data on the motion of Mars and ten years of his own to study said data. Easy-peasy!

And those three laws presaged Newton’s own laws of (universal) motion. I don’t know how well Newton knew Kepler’s work, but I plan to find out! I’m reading a bio of Newton right now. :)

This is a lovely slim volume (about 75 pages). I listened to it for free on LibriVox. It’s startlingly science-y, that is, the author doesn’t shy away from describing the science of Kepler. Indeed he even uses a lot of (but not too many) old-timey science terms. Wish I had listened to the glossary first, rather than last!
Profile Image for Juan.
26 reviews1 follower
May 22, 2017
Kepler vivió en una época en que la ciencia no tenía la menor noción de las
leyes físicas ocultas en la naturaleza.
Fue la primera persona en la historia de la especie humana en entender correcta y cuantitativamente la mecánica de los planetas y el Sistema Solar.
Introdujo tres leyes importantes acerca del movimiento de los planetas, y ayudó a que el modelo del Sistema Solar de Copérnico obtuviera aprobación general.
A través de su obra podemos encontrar la armonía y la resonancia entre nuestros pensamientos y la forma en que funciona el mundo.
Aceptó los hechos a pesar de ir en contra de sus muy queridas creencias, prefirió la dura realidad a sus más caras ilusiones.
Profile Image for Josh Hedgepeth.
687 reviews180 followers
December 31, 2023
Not the underrated gem I'd hoped for. A lackluster end to the year. Simply put, it's a rather dull book with, at times, dated language.
Displaying 1 - 4 of 4 reviews