Nicolaus Copernicus Quotes

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.

Reading list (1972 edition)[edit] 1. Homer – Iliad, Odyssey 2. The Old Testament 3. Aeschylus – Tragedies 4. Sophocles – Tragedies 5. Herodotus – Histories 6. Euripides – Tragedies 7. Thucydides – History of the Peloponnesian War 8. Hippocrates – Medical Writings 9. Aristophanes – Comedies 10. Plato – Dialogues 11. Aristotle – Works 12. Epicurus – Letter to Herodotus; Letter to Menoecus 13. Euclid – Elements 14. Archimedes – Works 15. Apollonius of Perga – Conic Sections 16. Cicero – Works 17. Lucretius – On the Nature of Things 18. Virgil – Works 19. Horace – Works 20. Livy – History of Rome 21. Ovid – Works 22. Plutarch – Parallel Lives; Moralia 23. Tacitus – Histories; Annals; Agricola Germania 24. Nicomachus of Gerasa – Introduction to Arithmetic 25. Epictetus – Discourses; Encheiridion 26. Ptolemy – Almagest 27. Lucian – Works 28. Marcus Aurelius – Meditations 29. Galen – On the Natural Faculties 30. The New Testament 31. Plotinus – The Enneads 32. St. Augustine – On the Teacher; Confessions; City of God; On Christian Doctrine 33. The Song of Roland 34. The Nibelungenlied 35. The Saga of Burnt Njál 36. St. Thomas Aquinas – Summa Theologica 37. Dante Alighieri – The Divine Comedy;The New Life; On Monarchy 38. Geoffrey Chaucer – Troilus and Criseyde; The Canterbury Tales 39. Leonardo da Vinci – Notebooks 40. Niccolò Machiavelli – The Prince; Discourses on the First Ten Books of Livy 41. Desiderius Erasmus – The Praise of Folly 42. Nicolaus Copernicus – On the Revolutions of the Heavenly Spheres 43. Thomas More – Utopia 44. Martin Luther – Table Talk; Three Treatises 45. François Rabelais – Gargantua and Pantagruel 46. John Calvin – Institutes of the Christian Religion 47. Michel de Montaigne – Essays 48. William Gilbert – On the Loadstone and Magnetic Bodies 49. Miguel de Cervantes – Don Quixote 50. Edmund Spenser – Prothalamion; The Faerie Queene 51. Francis Bacon – Essays; Advancement of Learning; Novum Organum, New Atlantis 52. William Shakespeare – Poetry and Plays 53. Galileo Galilei – Starry Messenger; Dialogues Concerning Two New Sciences 54. Johannes Kepler – Epitome of Copernican Astronomy; Concerning the Harmonies of the World 55. William Harvey – On the Motion of the Heart and Blood in Animals; On the Circulation of the Blood; On the Generation of Animals 56. Thomas Hobbes – Leviathan 57. René Descartes – Rules for the Direction of the Mind; Discourse on the Method; Geometry; Meditations on First Philosophy 58. John Milton – Works 59. Molière – Comedies 60. Blaise Pascal – The Provincial Letters; Pensees; Scientific Treatises 61. Christiaan Huygens – Treatise on Light 62. Benedict de Spinoza – Ethics 63. John Locke – Letter Concerning Toleration; Of Civil Government; Essay Concerning Human Understanding;Thoughts Concerning Education 64. Jean Baptiste Racine – Tragedies 65. Isaac Newton – Mathematical Principles of Natural Philosophy; Optics 66. Gottfried Wilhelm Leibniz – Discourse on Metaphysics; New Essays Concerning Human Understanding;Monadology 67. Daniel Defoe – Robinson Crusoe 68. Jonathan Swift – A Tale of a Tub; Journal to Stella; Gulliver's Travels; A Modest Proposal 69. William Congreve – The Way of the World 70. George Berkeley – Principles of Human Knowledge 71. Alexander Pope – Essay on Criticism; Rape of the Lock; Essay on Man 72. Charles de Secondat, baron de Montesquieu – Persian Letters; Spirit of Laws 73. Voltaire – Letters on the English; Candide; Philosophical Dictionary 74. Henry Fielding – Joseph Andrews; Tom Jones 75. Samuel Johnson – The Vanity of Human Wishes; Dictionary; Rasselas; The Lives of the Poets

In the midst of all dwells the Sun. For who could set this luminary in another or better place in this most glorious temple, than whence he can at one and the same time brighten the whole.

I esteem myself happy to have as great an ally as you in my search for truth. I will read your work ... all the more willingly because I have for many years been a partisan of the Copernican view because it reveals to me the causes of many natural phenomena that are entirely incomprehensible in the light of the generally accepted hypothesis. To refute the latter I have collected many proofs, but I do not publish them, because I am deterred by the fate of our teacher Copernicus who, although he had won immortal fame with a few, was ridiculed and condemned by countless people (for very great is the number of the stupid). {Letter to fellow revolutionary astronomer Johannes Kepelr}

Mathemata mathematicis scribuntur.

The Christians who engaged in infamous persecutions and shameful inquisitions were not evil men but misguided men. The churchmen who felt they had an edict from God to withstand the progress of science, whether in the form of a Copernican revolution or a Darwinian theory of natural selection, were not mischievous men but misinformed men.

After the birth of printing books became widespread. Hence everyone throughout Europe devoted himself to the study of literature... Every year, especially since 1563, the number of writings published in every field is greater than all those produced in the past thousand years. The Paracelsians have created medicine anew and the Copernicans have created astronomy anew. I really believe that at last the world is alive, indeed seething, and that the stimuli of these remarkable conjunctions did not act in vain.

There is talk of a new astrologer [Nicolaus Copernicus] who wants to prove that the earth moves and goes around instead of the sky, the sun, the moon, just as if somebody were moving in a carriage or ship might hold that he was sitting still and at rest while the earth and the trees walked and moved. But that is how things are nowadays: when a man wishes to be clever he must . . . invent something special, and the way he does it must needs be the best! The fool wants to turn the whole art of astronomy upside-down. However, as Holy Scripture tells us, so did Joshua bid the sun to stand still and not the earth. [Martin Luther stating his objection to heliocentrism due to his Scripture's geocentrism]

I often considered whether there could perhaps be found a more reasonable arrangement of circles.

If the people of Europe had known as much of astronomy and geology when the bible was introduced among them, as they do now, there never could have been one believer in the doctrine of inspiration. If the writers of the various parts of the bible had known as much about the sciences as is now known by every intelligent man, the book never could have been written. It was produced by ignorance, and has been believed and defended by its author. It has lost power in the proportion that man has gained knowledge. A few years ago, this book was appealed to in the settlement of all scientific questions; but now, even the clergy confess that in such matters, it has ceased to speak with the voice of authority. For the establishment of facts, the word of man is now considered far better than the word of God. In the world of science, Jehovah was superseded by Copernicus, Galileo, and Kepler. All that God told Moses, admitting the entire account to be true, is dust and ashes compared to the discoveries of Descartes, Laplace, and Humboldt. In matters of fact, the bible has ceased to be regarded as a standard. Science has succeeded in breaking the chains of theology. A few years ago, Science endeavored to show that it was not inconsistent with the bible. The tables have been turned, and now, Religion is endeavoring to prove that the bible is not inconsistent with Science. The standard has been changed.

...it's appalling to remember that the entire Oxford University Library was sold for scrap in the mid-1500s. Nor was that situation unique to Oxford, as libraries were deconstructed throughout the land.

...Bana öyle geliyor ki, Pythagorasçılar bazılarının düşündüğü gibi, öğretilerini paylaşmaktan duydukları kıskançlıktan değil de, büyük insanlara ait böylesine güzel ve binbir zorlukla dolu keşif, maddî bir kazancı olmaksızın kalem oynatmayı sıkıcı bulan ya da başkalarının yüreklendirip örnek olmasıyla hür felsefe çalışmasına özendirilse de aklî donukluklarından ötürü filozoflar arasında tıpkı bal arılarının arasındaki erkek arılar gibi duran kişilerce hor görülmesin diye böyle yapıyordu.

Nicolaus Copernicus was the father of the heliocentric model—the belief that the planets revolve around the sun—which ignited a scientific revolution in the 1500s that entirely obliterated the Church’s long-held teaching that mankind occupied the center of God’s universe. His discovery was condemned by the Church for three centuries, but the damage had been

The earth together with its surrounding waters must in fact have such a shape as its shadow reveals, for it eclipses the moon with the arc of a perfect circle. 1543 AD

The earth together with its surrounding waters must in fact have such a shape as its shadow reveals, for it eclipses the moon with the arc of a perfect circle." 1543 AD

For it is the duty of an astronomer to compose the history of the celestial motions through careful and expert study. - Nicolaus Copernicus (1473-1543)

The earth together with its surrounding waters must in fact have such a shape as its shadow reveals, for it eclipses the moon with the arc of a perfect circle. Nicolaus Copernicus, 1543 AD

Is it possible that the Pentateuch could not have been written by uninspired men? that the assistance of God was necessary to produce these books? Is it possible that Galilei ascertained the mechanical principles of 'Virtual Velocity,' the laws of falling bodies and of all motion; that Copernicus ascertained the true position of the earth and accounted for all celestial phenomena; that Kepler discovered his three laws—discoveries of such importance that the 8th of May, 1618, may be called the birth-day of modern science; that Newton gave to the world the Method of Fluxions, the Theory of Universal Gravitation, and the Decomposition of Light; that Euclid, Cavalieri, Descartes, and Leibniz, almost completed the science of mathematics; that all the discoveries in optics, hydrostatics, pneumatics and chemistry, the experiments, discoveries, and inventions of Galvani, Volta, Franklin and Morse, of Trevithick, Watt and Fulton and of all the pioneers of progress—that all this was accomplished by uninspired men, while the writer of the Pentateuch was directed and inspired by an infinite God? Is it possible that the codes of China, India, Egypt, Greece and Rome were made by man, and that the laws recorded in the Pentateuch were alone given by God? Is it possible that Æschylus and Shakespeare, Burns, and Beranger, Goethe and Schiller, and all the poets of the world, and all their wondrous tragedies and songs are but the work of men, while no intelligence except the infinite God could be the author of the Pentateuch? Is it possible that of all the books that crowd the libraries of the world, the books of science, fiction, history and song, that all save only one, have been produced by man? Is it possible that of all these, the bible only is the work of God?

the groundbreakers in many sciences were devout believers. Witness the accomplishments of Nicolaus Copernicus (a priest) in astronomy, Blaise Pascal (a lay apologist) in mathematics, Gregor Mendel (a monk) in genetics, Louis Pasteur in biology, Antoine Lavoisier in chemistry, John von Neumann in computer science, and Enrico Fermi and Erwin Schrodinger in physics. That’s a short list, and it includes only Roman Catholics; a long list could continue for pages. A roster that included other believers—Protestants, Jews, and unconventional theists like Albert Einstein, Fred Hoyle, and Paul Davies—could fill a book.

Who will venture to place the authority of Copernicus above that of the Holy Spirit? [Lutheran theologian Abraham Calovius illustrating his objection to heliocentrism due to the Bible's support of geocentrism]

Dynamical beauty transcends specific objects and phenomena, and invites us to imagine the expanse of possibilities. For example, the sizes and shapes of actual planetary orbits are not simple. They are neither the (compounded) circles of Aristotle, Ptolemy, and Nicolaus Copernicus, nor even the more nearly accurate ellipses of Kepler, but rather curves that must be calculated numerically, as functions of time, evolving in complicated ways that depend on the positions and masses of the Sun and the other planets. There is great beauty and simplicity here, but it is only fully evident when we understand the deep design. The appearance of particular objects does not exhaust the beauty of the laws.

FORBIDDEN TO BE CURIOUS Knowledge is sin. Adam and Eve ate the fruit of that tree and look what happened to them. Some time later, Nicolaus Copernicus, Giordano Bruno, and Galileo Galilei were punished for having shown that the earth moves around the sun. Copernicus

The idea of the Solar System dates back to 250 BC when Aristarchus of Samos suggested that the planets revolved around the Sun. This is called the heliocentric model, and was largely ignored until astronomer Nicolaus Copernicus confirmed it during the sixteenth century.

The full impact of the Lobachevskian method of challenging axioms has probably yet to be felt. It is no exaggeration to call Lobachevsky the Copernicus of Geometry [as did Clifford], for geometry is only a part of the vaster domain which he renovated; it might even be just to designate him as a Copernicus of all thought.

You know who Nicolaus Copernicus is?” “Was,” Walker said. “Some old astronomer. Polish, I think. Proved the earth goes around the sun.” Reacher nodded. “And much more than that, by implication. He asked us all to consider how likely is it that we’re at the absolute center of things? What are the odds? That what we’re seeing is somehow exceptional? The very best or the very worst? It’s an important philosophical point.

PREFACE Cosmology is the study of the universe as a whole, including its birth and perhaps its ultimate fate. Not surprisingly, it has undergone many transformations in its slow, painful evolution, an evolution often overshadowed by religious dogma and superstition. The first revolution in cosmology was ushered in by the introduction of the telescope in the 1600s. With the aid of the telescope, Galileo Galilei, building on the work of the great astronomers Nicolaus Copernicus and Johannes Kepler, was able to open up the splendor of the heavens for the first time to serious scientific investigation. The advancement of this first stage of cosmology culminated in the work of Isaac Newton, who finally laid down the fundamental laws governing the motion of the celestial bodies. Instead of magic and mysticism, the laws of heavenly bodies were now seen to be subject to forces that were computable and reproducible. A second revolution in cosmology was initiated by the introduction of the great telescopes of the twentieth century, such as the one at Mount Wilson with its huge 100-inch reflecting mirror. In the 1920s, astronomer Edwin Hubble used this giant telescope to overturn centuries of dogma, which stated that the universe was static and eternal, by demonstrating that the galaxies in the heavens are moving away

Why therefore should we hesitate any longer to grant to it the movement which accords naturally with its firm, rather than put the whole world in a commotion—the world whose limits we do not and cannot know? And why not admit that the appearance of daily revolution belongs to the heavens but the reality belongs to the Earth? And things are as when Aeneas said in Virgil: “ We sail out of the harbor, and the land and the cities move away.” Page 23

Actually, what we really need to remember about Galileo is that most of the people who use his name in argument could barely spell it, let alone tell us what actually happened to the man. His case is used over and over again because critics can't think of any other scientists who were mistreated by the Church. And in this instance they're right. There may have been some people in the scientific world who did not enjoy Church support and were even challenged by Catholicism but, sorry to disappoint, there weren't very many of them. The Church has been the handmaiden of science and scientific discovery, and those who refer to Galileo tend to forget that Louis Pasteur, the inventor of pasteurization, was a devout Catholic, as was Alexander Fleming, who gave us penicillin. Or Father Nicolaus Copernicus, who first proposed the theory of the earth revolving around the sun - this was precisely what Galileo stated, but Copernicus taught it as theory and not fact. Or Monsignor Georges Henri Joseph Édouard Lemaître, a Belgian Roman Catholic priest and professor of physics at the Catholic University of Leuven, who proposed what became known as the Big Bang theory of the origin of the Universe. In the field of acceleration, Fr. Giambattista Riccioli changed the way we understand that particular science; the father of modern Egyptology was Fr. Athanasius Kircher, and the Yugoslavian Fr. Roger Boscovich was the founder of modern atomic theory.

A man that is of Copernicus’ Opinion, that this Earth of ours is a Planet, carry’d round and enlightn’d by the Sun, like the rest of them, cannot but sometimes have a fancy  …   that the rest of the Planets have their Dress and Furniture, nay and their Inhabitants too as well as this Earth of ours.… But we were always apt to conclude, that ’twas in vain to enquire after what Nature had been pleased to do there, seeing there was no likelihood of ever coming to an end of the Enquiry  …   but a while ago, thinking somewhat seriously on this matter (not that I count my self quicker sighted than those great Men [of the past], but that I had the happiness to live after most of them) me thoughts the Enquiry was not so impracticable nor the way so stopt up with Difficulties, but that there was very good room left for probable Conjectures.

After a duration of a thousand years, the power of astrology broke down when, with Copernicus, Kepler, and Galileo, the progress of astronomy overthrew the false hypothesis upon which the entire structure rested, namely the geocentric system of the universe. The fact that the earth revolves in space intervened to upset the complicated play of planetary influences, and the silent stars, related to the unfathomable depths of the sky, no longer made their prophetic voices audible to mankind. Celestial mechanics and spectrum analysis finally robbed them of their mysterious prestige.

When in 1863 Thomas Huxley coined the phrase 'Man's Place in Nature,' it was to name a short collection of his essays applying to man Darwin's theory of evolution. The Origin of Species had been published only four years before, and the thesis that man was literally a part of nature, rather than an earthy vessel charged with some sublimer stuff, was so novel and so offensive to current metaphysics that it needed the most vigorous defense. Half the civilized world was rudely shocked, the other half skeptically amused. Nearly a century has passed since the Origin shattered the complacency of the Victorian world and initiated what may be called the Darwinian revolution, an upheaval of man's ideas comparable to and probably exceeding in significance the revolution that issued from Copernicus's demonstration that the earth moves around the sun. The theory of evolution was but one of many factors contributing to the destruction of the ancient beliefs; it only toppled over what had already been weakened by centuries of decay, rendered suspect by the assaults of many intellectual disciplines; but it marked the beginning of the end of the era of faith.

I AM A MACHINE” When I interviewed Dr. Rodney Brooks, former director of the MIT Artificial Intelligence Lab and cofounder of iRobot, I asked him if he thought machines would one day take over. He told me that we just have to accept that we are machines ourselves. This means that one day, we will be able to build machines that are just as alive as we are. But, he cautioned, we will have to give up the concept of our “specialness.” This evolution in human perspective started with Nicolaus Copernicus when he realized that the Earth was not the center of the universe, but rather goes around the sun. It continued with Darwin, who showed that we were similar to the animals in our evolution. And it will continue into the future, he told me, when we realize that we are machines, except that we are made of wetware and not hardware. It’s going to represent a major change in our world outlook to accept that we, too, are machines, he believes. He writes, “We don’t like to give up our specialness, so you know, having the idea that robots could really have emotions, or that robots could be living creatures—I think is going to be hard for us to accept. But we’re going to come to accept it over the next fifty years.” But on the question of whether the robots will eventually take over, he says that this will probably not happen, for a variety of reasons. First, no one is going to accidentally build a robot that wants to rule the world. He says that creating a robot that can suddenly take over is like someone accidentally building a 747 jetliner. Plus, there will be plenty of time to stop this from happening. Before someone builds a “super-bad robot,” someone has to build a “mildly bad robot,” and before that a “not-so-bad robot.” His philosophy is summed up when he says, “The robots are coming, but we don’t have too much to worry about. It’s going to be a lot of fun.” To him, the robot revolution is a certainty, and he foresees the day when robots will surpass human intelligence. The only question is when. But there is nothing to fear, since we will have created them. We have the choice to create them to help, and not hinder, us. MERGE WITH THEM? If you ask Dr. Brooks how we can coexist with these super-smart robots, his reply is straightforward: we will merge with them. With advances in robotics and neuroprosthetics, it becomes possible to incorporate AI into our own bodies.

In many fields—literature, music, architecture—the label ‘Modern’ stretches back to the early 20th century. Philosophy is odd in starting its Modern period almost 400 years earlier. This oddity is explained in large measure by a radical 16th century shift in our understanding of nature, a shift that also transformed our understanding of knowledge itself. On our Modern side of this line, thinkers as far back as Galileo Galilei (1564–1642) are engaged in research projects recognizably similar to our own. If we look back to the Pre-Modern era, we see something alien: this era features very different ways of thinking about how nature worked, and how it could be known. To sample the strange flavour of pre-Modern thinking, try the following passage from the Renaissance thinker Paracelsus (1493–1541): The whole world surrounds man as a circle surrounds one point. From this it follows that all things are related to this one point, no differently from an apple seed which is surrounded and preserved by the fruit … Everything that astronomical theory has profoundly fathomed by studying the planetary aspects and the stars … can also be applied to the firmament of the body. Thinkers in this tradition took the universe to revolve around humanity, and sought to gain knowledge of nature by finding parallels between us and the heavens, seeing reality as a symbolic work of art composed with us in mind (see Figure 3). By the 16th century, the idea that everything revolved around and reflected humanity was in danger, threatened by a number of unsettling discoveries, not least the proposal, advanced by Nicolaus Copernicus (1473–1543), that the earth was not actually at the centre of the universe. The old tradition struggled against the rise of the new. Faced with the news that Galileo’s telescopes had detected moons orbiting Jupiter, the traditionally minded scholar Francesco Sizzi argued that such observations were obviously mistaken. According to Sizzi, there could not possibly be more than seven ‘roving planets’ (or heavenly bodies other than the stars), given that there are seven holes in an animal’s head (two eyes, two ears, two nostrils and a mouth), seven metals, and seven days in a week. Sizzi didn’t win that battle. It’s not just that we agree with Galileo that there are more than seven things moving around in the solar system. More fundamentally, we have a different way of thinking about nature and knowledge. We no longer expect there to be any special human significance to natural facts (‘Why seven planets as opposed to eight or 15?’) and we think knowledge will be gained by systematic and open-minded observations of nature rather than the sorts of analogies and patterns to which Sizzi appeals. However, the transition into the Modern era was not an easy one. The pattern-oriented ways of thinking characteristic of pre-Modern thought naturally appeal to meaning-hungry creatures like us. These ways of thinking are found in a great variety of cultures: in classical Chinese thought, for example, the five traditional elements (wood, water, fire, earth, and metal) are matched up with the five senses in a similar correspondence between the inner and the outer. As a further attraction, pre-Modern views often fit more smoothly with our everyday sense experience: naively, the earth looks to be stable and fixed while the sun moves across the sky, and it takes some serious discipline to convince oneself that the mathematically more simple models (like the sun-centred model of the solar system) are right.

Because Aristotle’s was the accepted lens on the universe, centuries of medieval scientists and thinkers went to great lengths to make epicycles work. It wasn’t until the sixteenth century, with one simple but profound observation, that Renaissance astronomer Nicolaus Copernicus reframed our view of the universe. The planets revolved not around the earth, but around the sun. Finally, understanding that provided a foundation for some of the most important advances in history and the foundation for modern astronomy and calculus. Of course, it took eighteen centuries for someone like Copernicus to see and articulate the flaws in Aristotle’s logic. And even he died without knowing that the world would accept he was right. Changing a well-established view of the world rarely happens overnight—and even when it happens, it still takes time to refine and perfect the right new perspective. In the world of innovation, many companies are stuck in a world of creating “epicycles”: elaborate approximations, estimations, and extrapolations. Because we gather, fine-tune, and cross-reference all manner of data, it seems like we should be getting better and better at predicting success. But if we fail to understand why customers make the choices they make, we’re just getting better and better at a fundamentally flawed process. Without the right understanding of the causal mechanism at the center of the innovation universe, companies are trying to make sense of the universe revolving around the earth. They’re forced to rely on an array of borrowed best practices, probabilistic tools, and tips and tricks that have worked for other companies, but which can’t guarantee success. As you look at innovation through the lenses of the Jobs Theory, what you see is not the customer at the center of the innovation universe, but the customer’s Job to Be Done. It may seem like a small distinction—just a few minutes of arc—but it matters a great deal. In fact, it changes everything.

Nicolaus Copernicus, fearing ridicule and rejection, refused to publish his discovery that the earth revolves around the sun. For 26 years, he shared his ideas only privately with friends. His theory only became public when another professor took the initiative to publish it. After

The model favoured by Schreck, one that had been in existence for some forty years, placed the planets in orbit around the sun, and the sun and moon in orbit around the earth. Complex though this was, it appeared to a majority of astronomers the one that best corresponded to the available evidence. There were some, however, who preferred an altogether more radical possibility. Among them was a Czech Jesuit, Wenceslas Kirwitzer, who had met Galileo in Rome, and then sailed with Schreck to China, where he had died in 1626. Prior to his departure, he had written a short pamphlet, arguing for heliocentrism: the hypothesis that the earth, just like Venus and the other planets, revolved around the sun.24 The thesis was not Kirwitzer’s own. The first book to propose it had been published back in 1543. Its author, the Polish astronomer Nicolaus Copernicus, had in turn drawn on the work of earlier scholars at Paris and Oxford, natural philosophers who had argued variously for the possibility that the earth might rotate on its axis, that the cosmos might be governed by laws of motion, even that space might be infinite. Daring though Copernicus’ hypothesis seemed, then, it stood recognisably in a line of descent from a long and venerable tradition of Christian scholarship. Kirwitzer was not the only astronomer to have been persuaded by it. So too had a number of others; and of these the most high profile, the most prolific, the most pugnacious, was Galileo.

And astronomy stagnated for decades because Nicolaus Copernicus refused to publish his original discovery that the earth revolves around the sun. Fearing rejection and ridicule, he stayed silent for twenty-two years, circulating his findings only to his friends. Eventually,

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge." – Nicolaus Copernicus

In 1543, Polish astronomer and priest Nicolaus Copernicus (1473–1543) put our corner of the universe in order, suggesting that the Sun and not Earth was at the center of our planetary system. The idea contradicted the teachings of the Church, but was eventually proved by Galileo.

A theory may be superseded by a new theory which explains more, and is more accurate, but is also easier to understand, in which case the old theory becomes redundant, and we gain more understanding while needing to learn less than before. That is what happened when Nicolaus Copernicus’s theory of the Earth travelling round the Sun superseded the complex Ptolemaic system which had placed the Earth at the centre of the universe.

19 NICOLAUS COPERNICUS 1473-1543