Johannes Kepler

1571 - 1630

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Johannes Kepler (; German: [joˈhanəs ˈkɛplɐ, -nɛs -] ; 27 December 1571 – 15 November 1630) was a German astronomer, mathematician, astrologer, natural philosopher and writer on music. He is a key figure in the 17th-century Scientific Revolution, best known for his laws of planetary motion, and his books Astronomia nova, Harmonice Mundi, and Epitome Astronomiae Copernicanae, influencing among others Isaac Newton, providing one of the foundations for his theory of universal gravitation. The variety and impact of his work made Kepler one of the founders and fathers of modern astronomy, the scientific method, natural and modern science. Read more on Wikipedia

Since 2007, the English Wikipedia page of Johannes Kepler has received more than 5,316,447 page views. His biography is available in 145 different languages on Wikipedia (up from 141 in 2019). Johannes Kepler is the 3rd most popular astronomer, the 13th most popular biography from Germany (down from 11th in 2019) and the most popular German Astronomer.

Johannes Kepler is most famous for his three laws of planetary motion. His first law states that the planets orbit the sun in ellipses, not circles. His second law states that a line connecting the planet to the sun sweeps out equal areas in equal times. His third law states that the square of the orbital period is proportional to the cube of the semi-major axis.

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Among astronomers, Johannes Kepler ranks 3 out of 644Before him are Galileo Galilei, and Nicolaus Copernicus. After him are Giordano Bruno, Ptolemy, Anders Celsius, Tycho Brahe, William Herschel, Ulugh Beg, Ja'far al-Sadiq, Aristarchus of Samos, and Edwin Hubble.

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Among people born in 1571, Johannes Kepler ranks 1After him are Caravaggio, Abbas the Great, Frederick de Houtman, Hasekura Tsunenaga, Emperor Go-Yōzei, Michael Praetorius, Thomas Mun, Mulla Sadra, Ferdinand, Prince of Asturias, Willem Blaeu, and Charles, Duke of Guise. Among people deceased in 1630, Johannes Kepler ranks 1After him are Charles Emmanuel I, Duke of Savoy, Ambrogio Spinola, 1st Marquess of Balbases, Yuan Chonghuan, Fede Galizia, Henry Briggs, Johann Schein, Agrippa d'Aubigné, Christian I, Prince of Anhalt-Bernburg, Gioachino Greco, Akile Hatun, and Yamada Nagamasa.

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In Germany

Among people born in Germany, Johannes Kepler ranks 13 out of 7,253Before him are Johann Wolfgang von Goethe (1749), Carl Friedrich Gauss (1777), Johannes Gutenberg (1394), Henry Kissinger (1923), Friedrich Nietzsche (1844), and Otto von Bismarck (1815). After him are Albrecht Dürer (1471), Georg Wilhelm Friedrich Hegel (1770), Richard Wagner (1813), Gottfried Wilhelm Leibniz (1646), Peter Paul Rubens (1577), and Max Weber (1864).

Among ASTRONOMERS In Germany

Among astronomers born in Germany, Johannes Kepler ranks 1After him are William Herschel (1738), Heinrich Wilhelm Matthias Olbers (1758), Caroline Herschel (1750), Johann Gottfried Galle (1812), Wilhelm Schickard (1592), Heinrich Louis d'Arrest (1822), Max Wolf (1863), Johann Bayer (1572), Johann Franz Encke (1791), Simon Marius (1573), and Friedrich Georg Wilhelm von Struve (1793).