Philosophy Word of the Day — Nicolaus Copernicus

Heliocentric universe, Harmonia Macrocosmica

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“Nicolaus Copernicus (1473–1543) was a mathematician and astronomer who proposed that the sun was stationary in the center of the universe and the earth revolved around it. Disturbed by the failure of Ptolemy’s geocentric model of the universe to follow Aristotle’s requirement for the uniform circular motion of all celestial bodies and determined to eliminate Ptolemy’s equant, an imaginary point around which the bodies seemed to follow that requirement, Copernicus decided that he could achieve his goal only through a heliocentric model. He thereby created a concept of a universe in which the distances of the planets from the sun bore a direct relationship to the size of their orbits. At the time Copernicus’s heliocentric idea was very controversial; nevertheless, it was the start of a change in the way the world was viewed, and Copernicus came to be seen as the initiator of the Scientific Revolution.” (continue article)

— Sheila Rabin, Stanford Encyclopedia of Philosophy

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Unsolved Scientific Mysteries

Science is fascinating, beneficial (when used rightly), and helps us understand and appreciate God’s creation.  New Scientist lists 13 riddles that still remain a mystery to science.  For example,

Axis of evil

(Image: WMAP / NASA)

Radiation left from the big bang is still glowing in the sky – in a mysterious and controversial pattern

Dark flow

The galaxy cluster 1E 0657-56, 3.8 billion light-years away, is one of hundreds that appear to be carried along by a mysterious cosmic flow (Image: NASA / STScI / Magellan / U.Arizona / D.Clowe et al)

Something unseeable and far bigger than anything in the known universe is hauling a group of galaxies towards it at inexplicable speed (Continue)

(Via Freakonomics)

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Six Myths about Galileo and the Church

Portrait of Galileo Galilei by Justus Susterma...
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The Christian History blog sets right some popular myths about Galileo’s life and work to commemorate the “400th Anniversary of Galileo’s First Telescope.” Points 3 through 6 deal with his relationship to the church.

3.  . . .  when he did look into space and published his findings that the earth really wasn’t the center of the universe, it caused outrage throughout Christendom.

“It’s tempting to see it representing a fundamental break in the relations between science and religion, but I don’t think it represented anything of the sort,” says science historian Ron Numbers, editor of the recently published Galileo Goes to Jail and Other Myths About Science and Religion (Harvard University Press). “In fact, at the time, it aroused relatively little interest. It was only in later decades and centuries that it came to be seen as a representation of what supposedly happens to scientific pioneers when they dare to try to correct the church’s teachings.”

In Sightings, Karl E. Johnson recently summarized some of the other facts that get in the way of the science vs. faith narrative.

Galileo’s Dialogue Concerning the Two Chief World Systems, the source of controversy, previously had been read and approved by the Church’s censors; and Pope Urban VIII, who presided over the trial, was Galileo’s friend and admirer. Consider also: prior to the trial, Galileo stayed in the Tuscan embassy; during the trial, he was put up in a six-room apartment, complete with servant; following the trial, his “house arrest” consisted of being entertained at the palaces of the grand duke of Tuscany and the Archbishop of Siena. Galileo, apparently, was no ordinary heretic.

4. Friendly or not, the Roman Catholic Church thought Galileo’s science contradicted Scripture and therefore could not be true! That’s why Cardinal Bellarmine ordered Galileo to back away from Copernican theory.

Well, there is this quote:

In the learned books of worldly authors are contained some propositions about nature which are truly demonstrated, and others which are simply taught; in regard to the former, the task of wise theologians is to show that they are not contrary to Holy Scripture; as for the latter (which are taught but not demonstrated with necessity), if they contain anything contrary to the Holy Writ, then they must be considered indubitably false and must be demonstrated such by every possible means.

But that came from Galileo. Cardinal Bellarmine, a friend of Galileo, said this:

If there were a true demonstration that the sun is at the centre of the world and the earth in the third heaven, and that the sun does not circle the earth but the earth circles the sun, then one would have to proceed with great care in explaining the Scriptures that appear contrary, and say rather that we do not understand them than that what is demonstrated is false. But this is not a thing to be done in haste, and as for myself I shall not believe that there are such proofs until they are shown to me.

At issue were biblical texts that said the earth “cannot be moved.” But a geocentric view of the universe owed more to the Greek mathematician Ptolemy than to Scripture. (Continue)

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Philosophy Word of the Day – Johannes Kepler (1571-1630)

A 1610 portrait of Johannes Kepler by an unkno...
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German astronomer who modified the heliocentric views of Copernicus by postulating that planets move in elliptical (not circular) orbits with the sun at one focus, each of them sweeping through arcs of equal area in equal times. Despite his penchant for neoplatonic explanations, Kepler’s achievement, published in Astronomia Nova (A New Astronomy based on Causes) (1609) {at Amazon.com} and Harmonia Mundi (The Harmony of the World) (1618) {at Amazon.com}, provided an important step toward the comprehensive mathematical theory of celestial motion developed by Newton.

(Via Philosophical Dictionary)

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