Copernicus publishes heliocentric theory
Nicolaus Copernicus's On the Revolutions of the Heavenly Spheres is printed, placing the Sun at the centre and launching the Scientific Revolution.
Nicolaus Copernicus's On the Revolutions of the Heavenly Spheres is printed, placing the Sun at the centre and launching the Scientific Revolution.
Johannes Kepler publishes Astronomia nova, stating his first two laws of planetary motion, including elliptical orbits.
William Harvey publishes De Motu Cordis, demonstrating that the heart pumps blood in a continuous circuit around the body.
The physicist Albert Einstein, author of the theory of relativity, is born in Ulm, Germany.
In Berlin, Robert Koch announces the discovery of the bacterium that causes tuberculosis, strengthening the germ theory of disease.
Wilhelm Röntgen discovers X-rays at Würzburg, opening the era of medical imaging.
Max Planck presents the hypothesis that energy is emitted in discrete quanta, marking the birth of quantum physics.
Albert Einstein presents the field equations of general relativity to the Prussian Academy of Sciences, describing gravity as the curvature of spacetime.
Otto Hahn and Fritz Strassmann discover the fission of uranium nuclei; Lise Meitner and Otto Frisch explain the process shortly after.