The Fixed And (Un)moving (Consensus) Center

Pajamas Media » Rick Perry Versus the True Believers: "The most important problem with Galileo’s heliocentric theory, and one that was widely recognized by his scientific contemporaries, was the lack of “observable parallax shifts in the stars’ positions as the earth moved in its orbit around the sun.” It was only much later that instruments were designed that were sensitive enough to detect the shifts. Therefore, Galileo lacked scientific evidence to prove his theory, and many leading astronomers of the day rejected it. The renowned Tycho Brahe was one of them; he had his own competing theory, which was a Geo-Heliocentric hybrid in which the sun revolved around the earth but the other planets revolved around the sun, a system that conformed better than Galileo’s with the lack of observed stellar parallax and which remained in scientific favor for a long time.

I have written that Galileo’s theory turned out to be correct, but that is actually an over-simplication. Galileo was indeed correct in stating that the planets revolve around the sun. But he also believed that the sun is the fixed and unmoving center of the universe, which we now know to be incorrect.

This error does not contradict the fact that Galileo was a scientific giant. But the story is a reminder that even the brilliant make mistakes, and that science does not advance by simple progression from ignorance to perfect knowledge, nor is it proven by consensus."

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