This is crosspostd from a late-night whimsical Facebook post, maybe should be a shortform post.

Individual scientists embrace a new paradigm for all sorts of reasons and usually for several at once. Some of these reasons—for example, the sun worship that helped make Kepler a Copernican—lie outside the apparent sphere of science entirely" 
– Thomas Kuhn [1]

Wait wut?

You mean to say that Johannes Kepler adopted the Copernican heliocentric model not because of any scientific merit but because he worshiped the sun like some Egyptian?

I note a lot of references for future potential use, but this is one I had to look up then and there.

Kuhn takes this from E. A. Burrt who applies the term "sun worship" somewhat creatively. Kepler was in fact a devout Christian, not a follower of Ra (too bad, would have been cool). He was deeply motivated by finding simple models that showed had the natural world was simple and united (and thereby mirrored the divine), and that was one motivation for adopting Coperniciasm; however, Burrt says the most potent (and perhaps sufficient) factor for Kepler adopting the theory was the exaltation and dignity it gave to the sun.

In support, Burtt cites a fragment of a disputation that a 22yo Kepler argued in at Tübingen in 1593:

"In the first place, lest perchance a blind man might deny it to you, of all the bodies in the universe the most excellent is the sun, whose whole essence is nothing else than the purest light, than which there is no greater star; which singly and alone is the producer, conserver, and warmer of all things; it is a fountain of light, rich in fruitful heat, most fair, limpid, and pure to the sight, the source of vision, portrayer of colours...[see full excerpt in attached image]" 
– cited in E. A. Burrt [2]

Alright, Burrt, "sun worship" seems fair. Dude was really into the sun.

In addition to his solar-adulations, Kepler was also a very badass mathematician and empiricist, extremely data and precision obsessed. He treated the parabola as the limiting case of ellipse and hyperbola, showed that parallel lines can be regarded as meeting at infinity, applied infinitesimals to volume calculations preparing the way for Newton and Leibniz, and other stuff I don't understand.

He also said badass things like: "without proper experiments, I conclude nothing!" [exclamation added] which I think I might find myself quoting appropriately or not.

Good stuff, Kepler, I'll remember to appreciate the Sun more because of you, and update that people choosing paradigms for non-scientific reasons can still result in tremendously great work.

Sun-worship reacts only, please.

See Also

• The Copernican Revolution from the Inside

References

[1] Kuhn, Thomas S., The Structure of Scientific Revolutions (pp. 151-152). University of Chicago Press. Kindle Edition.

[2] Burtt, Edwin A., Metaphysical foundations of modern physical science (p. 59). Dover Publications