1838 ⟶ Friedrich Bessel Measures Stellar Parallax
Friedrich Bessel: first successful measure of stellar parall...
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1912
🪐 Kepler Publishes First Two Laws of Planetary Motion
Johannes Kepler: first two laws of planetary motion.⟶
AstronomyScientific RevolutionPlanetary MotionPhysicsMathematicsJohannes KeplerTycho Brahe
Germany🧪 Wöhler Synthesizes Urea, Dismantling Vitalism
Friedrich Wöhler synthesized urea, refuting vitalism.⟶
ChemistryScientific RevolutionModern Science
Germany🔭 Friedrich Bessel Measures Stellar Parallax
Friedrich Bessel: first successful measure of stellar parallax (to star 61 Cygni).⟶
AstronomyPhysicsScientific RevolutionObservational AstronomyStarsMeasurement
Germany🌡️ Rudolf Clausius Defines Entropy
📡 Hertz Demonstrates Radio Waves, Validating Maxwell's Electromagnetic Theory
Heinrich Hertz publishes a conclusive proof of James Clerk Maxwell's electromagnetic theory in experiments that also demonstrate the existence of radio waves. The effects of electromagnetic waves had been observed by many people before this but no usable theory explaining them existed until Maxwell.⟶
PhysicsElectromagnetismScientific RevolutionCommunicationGlobal Impact
Germany