The Scientific Revolution: from Copernicus to Newton
AdvancedIn 1543 Copernicus proposed heliocentrism; Galileo's telescope backed the new astronomy; in 1687 Newton explained heaven and earth with gravitation and the laws of motion. The scientific method — observation, hypothesis, experiment, verification — shook Church authority and became the direct source of the Enlightenment.
- Copernicus's On the Revolutions (1543) → Galileo's telescope (from 1609) → Newton's Principia (1687)
- Kepler's elliptical orbits fitted theory to data; calculus became science's mathematical engine
- Galileo's trial (1633): the emblematic clash of new science with Church authority
文體小知識：歷史專題課：接著「哥白尼→克卜勒→伽利略→牛頓」四位科學家接力的線索行，留意科學方法（觀察→假說→實驗→驗證）怎樣一步步確立——這條是常考的「影響」鏈。
§Text Passage
1In the sixteenth and seventeenth centuries European learning was transformed. Medieval scholars had followed the Greek astronomer Ptolemy's 'geocentric' model: Earth sat at the centre of the universe with sun, moon and stars circling it, and the Church taught the world on this basis. The Renaissance, the great voyages (which demanded precise astronomy) and printing built the stage for a new science.
2In 1543 the Polish astronomer Copernicus published On the Revolutions of the Heavenly Spheres on his deathbed, proposing the 'heliocentric' model: Earth is one planet among several, circling the sun with them. The German Kepler, working from years of precise observations by the Dane Tycho Brahe, derived his three laws of planets moving in elliptical orbits. From 1609 the Italian Galileo turned a homemade telescope to the sky: Jupiter had moons, Venus showed phases, the Moon's surface was rough — what his eyes saw supported Copernicus. In 1633 the Inquisition tried him; he spent his last years under house arrest and his Dialogue was banned.
3In 1687 the English scientist Newton published the Principia Mathematica, setting out the law of universal gravitation and three laws of motion: a falling apple and the orbiting Moon obey the same mathematical laws. Independently of Leibniz, he also invented calculus, a powerful mathematical engine for science. Newton's synthesis settled heliocentrism beyond doubt and convinced Europeans that the universe ran like clockwork, by laws human reason could discover.
4The Scientific Revolution changed more than astronomy — it fixed a method of enquiry. Bacon urged observation and experiment; Descartes taught reason to doubt everything ('I think, therefore I am'); hypothesis, experiment, verification became the standard procedure. The Royal Society was founded in England in 1660 and the French Academy of Sciences in 1666: research turned from a private hobby into an organised enterprise. Method and societies shook the old habit of explaining everything by ancient authority and the plain word of Scripture, and became the direct source of the Enlightenment.
1Summary 重點摘要
In 1543 Copernicus proposed heliocentrism; Galileo's telescope backed the new astronomy; in 1687 Newton explained heaven and earth with gravitation and the laws of motion. The scientific method — observation, hypothesis, experiment, verification — shook Church authority and became the direct source of the Enlightenment.
2Vocabulary cards Vocabulary
The transformation of European learning in the 1500s–1600s, replacing ancient authority with observation, experiment and mathematics — from Copernicus's heliocentrism to Newtonian mechanics.
The theory that the sun lies at the centre with Earth and the planets orbiting it, proposed systematically in Copernicus's On the Revolutions (1543).
Ptolemy's model, orthodox through the Middle Ages: a fixed Earth at the centre with sun, moon and stars circling it.
Polish astronomer whose On the Revolutions (1543), published as he lay dying, proposed heliocentrism — the usual starting point of the Scientific Revolution.
Italian scientist who from 1609 used a telescope to find Jupiter's moons and Venus's phases, supporting heliocentrism; tried by the Inquisition in 1633, he died under house arrest in 1642.
English scientist whose Principia (1687) stated the law of universal gravitation and three laws of motion; he also invented calculus independently of Leibniz.
Newton's law that any two bodies attract each other, the force growing with mass and shrinking with the square of distance — one law for heaven and earth.
The procedure of observation, hypothesis, experiment and revision — urged by Bacon and Descartes and demonstrated by Galileo.
The English scientific society founded in 1660, publishing papers and testing claims by experiment — science organised as an institution.
The optical instrument that appeared in the Netherlands around 1608; Galileo improved one and turned it to the sky, bringing unseen heavenly evidence to human eyes.
3Step by step Steps
- Para 1: the old sky and the new stageMedieval orthodoxy was Ptolemy's geocentrism: a motionless Earth at the centre with sun, moon and stars circling it, the frame through which the Church explained the world. The Renaissance freed thought, the age of exploration created practical demand for astronomy and mathematics, printing circulated books widely, and instruments and methods kept improving — the stage was set for a revolution that would remake humanity's picture of the universe.
- Para 2: Copernicus and KeplerIn 1543, as he lay dying, Copernicus published On the Revolutions of the Heavenly Spheres, proposing heliocentrism and demoting the Earth from the centre of the universe to one planet among several orbiting the sun. The Danish astronomer Tycho Brahe then accumulated decades of precise observations, and his assistant Kepler, working from this data, derived his three laws — including that planets move in elliptical orbits — so that calculation finally matched observation: theory now had to follow the data, a decisive step in the scientific attitude.
- Para 2: Galileo's telescope and trialFrom 1609 Galileo turned telescopes of his own making on the sky, finding four moons of Jupiter, the phases of Venus and the cratered face of the Moon — sights that geocentrism struggled to explain and heliocentrism supported. His fame grew, and so did the Church's alarm: in 1633 the Inquisition convicted him of suspicion of heresy and sentenced him to lifelong house arrest. The collision between the new science and Church authority had consequences far beyond one man and one case.
- Para 3: Newton's synthesisIn 1687 Newton published the Principia Mathematica, setting out the law of universal gravitation and three laws of motion: the falling apple and the orbiting Moon obey one and the same set of mathematical laws, uniting heaven and earth in a single mechanics. With the calculus he developed as an analytical tool, the universe emerged in his pages as a great clock running by fixed rules, open to human reason and calculation — a synthesis regarded as the peak of the Scientific Revolution.
- Para 4: the method fixedThe revolution changed conclusions, but above all it fixed the way conclusions are reached. Bacon stressed observation and experiment, arguing knowledge grows from experience; Descartes stressed reason and systematic doubt, taking 'I think, therefore I am' as the starting point of inquiry. Propose a hypothesis, test it by experiment, revise by results: this became the standard procedure. The Royal Society (1660) and the French Academy of Sciences (1666) institutionalised research, and scientific bodies and journals let knowledge accumulate and be cross-checked.
- Analysis: the contest with authorityThe clash between science and the Church was at bottom a contest over who decides truth: ancient books and church courts, or observation and mathematical proof? Galileo's trial was the emblem of that contest — yet repression could not stop evidence from persuading minds. European learned opinion gradually accepted a new principle: nature's laws are settled by evidence, and no authority stands above tested fact.
- Summary: the road to the EnlightenmentThe Scientific Revolution's greatest achievement was proof that human reason can discover the laws by which nature runs. If nature has laws, thinkers asked, might society, politics and religion have laws of their own that can be known? The Enlightenment applied the same reason and the same method to human affairs — scientific method became the Enlightenment's methodological source, and the two movements formed one continuous line whose influence lasts to this day.
4Diagrams Diagrams
5Worked example Example
Example: why did heliocentrism take more than a century to win general acceptance? Consider evidence, theory and authority.
- Evidence came late: in 1543 Copernicus had calculation, not new observation; telescopic evidence (Galileo's moons of Jupiter and phases of Venus, from 1610) arrived over half a century later
- The theory needed refining: the first model still used circular orbits and mispredicted positions; Kepler's ellipses (1609) finally matched observation
- Authority pushed back: geocentrism was tied to the plain sense of Scripture, and Galileo's 1633 condemnation showed the Church's institutional power against the new teaching
- The last word awaited Newton: universal gravitation (1687) explained mathematically why planets orbit the sun, turning heliocentrism from hypothesis into a system no one could dispute
- Answer: Heliocentrism went through Copernicus's proposal (1543), Kepler's correction (1609), Galileo's observations (from 1610) and Newton's proof (1687) — over a century in all: evidence had to accumulate, theory had to be revised, and authority took time to digest. Tip: answer 'why slow' along evidence, theory and authority, each line with dated evidence.
6Common mistakes Mistakes
7Quick check Quick check
Q1In what year did Copernicus propose heliocentrism, and in which work?
Q2What were Galileo's key discoveries with the telescope?
Q3Why was Galileo tried in 1633, and what was the outcome?
Q4Which two great theories did Newton's 1687 work set out?
Q5What are the basic steps of the scientific method?
8Recap Recap
- Copernicus's On the Revolutions (1543) → Galileo's telescope (from 1609) → Newton's Principia (1687)
- Kepler's elliptical orbits fitted theory to data; calculus became science's mathematical engine
- Galileo's trial (1633): the emblematic clash of new science with Church authority
- The method: observation → hypothesis → experiment → verification; the Royal Society (1660) institutionalised research
- Reason reading nature's laws replaced ancient authority — the direct source of the Enlightenment