The Scientific Revolution
The 16th–17th century transformation of natural philosophy into empirical, mathematical science, associated with Copernicus, Galileo, Kepler, and Newton.
The Scientific Revolution was the transformation of European natural philosophy between roughly 1543 and 1700 into something recognizable as modern science: knowledge based on systematic observation, controlled experiment, and mathematics, pursued in public institutions and communicated in print. It did not happen at once or in one place, but its achievements reorganized humanity's picture of the cosmos and of knowledge itself.
The pivotal break was astronomical. Nicolaus Copernicus's De revolutionibus (1543) placed the Sun, not the Earth, at the center — a hypothesis that was simpler than Ptolemy's system but still used circular orbits. Tycho Brahe's precise naked-eye observations, gathered over decades at Uraniborg, provided the data that Johannes Kepler used to establish elliptical orbits and his three laws of planetary motion (1609, 1619). Galileo Galilei then pointed a telescope at the heavens (1610): the mountains of the Moon, the moons of Jupiter, and the phases of Venus gave physical evidence for the heliocentric system. Galileo's trial in 1633, forced by the Inquisition to recant, made science-and-religion conflict a permanent historical question.
Mechanics was rebuilt from the ground up. Galileo's experiments on falling bodies and pendulums established the law of inertia and the mathematical description of accelerated motion — the first modern physics. René Descartes provided the philosophical frame: a mechanical universe of matter in motion, and the method of systematic doubt (Discourse on the Method, 1637). The synthesis came with Isaac Newton's Principia (1687), which unified terrestrial and celestial mechanics: universal gravitation, the three laws of motion, and the derivation of Kepler's laws from them — the first great mathematical theory of nature. Newton's laws of motion and law of gravity would stand essentially unchallenged for two centuries.
Equally revolutionary were the methods and institutions. Francis Bacon argued for induction from observations and experiments (Novum Organum, 1620); the Royal Society (1660) and the Académie des Sciences (1666) institutionalized collaborative, communicated, experimental science; and the new instruments — telescope, microscope, air pump, pendulum clock — expanded the senses. William Harvey's demonstration of the circulation of the blood (1628) applied quantitative reasoning to biology. The revolution also had limits: the mechanical philosophy and the religious framework coexisted in complex ways, and its practitioners were a small elite. Historians today stress continuities with Renaissance naturalism and the practical arts, but the outcome is not in doubt: by 1700, the enterprise we call science existed, and the scientific method had a home.
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