Subtitle: Copernicus and 'The Revolutions of the Heavenly Spheres'. Part of the 'Great Discoveries' series.
Copernicus ranks up there with Einstein, Newton, Darwin, Mendel, and Galileo in the Hall of Fame of scientists who overturned the way we think about God, the world, and humanity's place in it. With the possible exception of Mendel, however, he is much less well known as a human being (rather than just an adjective: "Copernican"). This book aims to do what is possible to change this. It also explains simultaneously that:
a) Copernicus did in many ways less than he is given credit for, but
b) what he did was far more difficult than he is usually given credit for.
The first thing that I didn't know about Copernicus was that he reached his conclusions about the Earth orbiting the Sun instead of vice versa, without benefit of a telescope. Galileo could look through his telescope and see moons orbiting Jupiter, and rings around Saturn, to encourage him to believe that the planets were not fixed in heavenly spheres, and they didn't all orbit the Sun. Copernicus had no such help, but it was in large part because of his conclusions that people such as Galileo would later look for evidence in support of his theory.
The second thing I didn't know about Copernicus, is that he developed a theory nearly as bizarrely complex as the geocentric theory he was replacing. The author, William Vollmann, does a masterful job of attempting to demonstrate to us how Copernicus believed this all worked. "His Venusian orbit is immortalized pearls of ghastly syntax", Vollmann says, in excusing his decision to quote a later astronomer's summary instead of Copernicus himself. The diagrams do more than the prose to help us understand what elaborate clockwork Copernicus wanted to use, to replace the even more elaborate clockwork of the Earth-centered model.
The third thing I didn't know about Copernicus, is that he mostly relied upon Ptolemy's observations and measurements. The same Ptolemy whose theories he was overthrowing was, in Copernicus' own view, a masterfully detailed observer, and he had no problem with using Ptolemy's own data in support of his (Copernicus') theory.
Lastly, I didn't know that so little was known about Copernicus, even by historians of science. He was in some ways saved from the flames (which other heretics before and after him were sent to) for the same reason: he lived, worked, and eventually died (of natural causes, in his own bed) in a part of Europe which was not central to the intellectual life of Europe (up until him, anyway). Vollmann does what he can to piece together the scraps of evidence we have about Copernicus' life into a coherent narrative, but one is reminded of the archaeologist who has a piece of femur and three teeth and therefore surmises what the animal looked like.
Reading the story of Copernicus and his time, and how they impacted one another, is a nice example of looking at a revolution in a time so different we can view it with some objectivity. Copernicus was not like Martin Luther, a man who sought out opportunities to shake up the status quo; he was a man who called them as he saw them, more like Darwin, but what he saw caused as great a change in how we see the world as Luther or other intentional revolutionaries.
In his dissection of 'The Revolutions of the Heavenly Spheres', Vollmann does a masterful job. I are not ever likely to read the work itself, and even if I did I would not understand enough of the context (what came before it, and what was thought of it afterwards). Vollmann has done this with clarity and a wry wit. Bravo.