Johannes Kepler

1571 - 1630

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Johannes Kepler (; German: [joˈhanəs ˈkɛplɐ, -nɛs -] (listen); 27 December 1571 – 15 November 1630) was a German astronomer, mathematician, and astrologer. 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. Read more on Wikipedia

Since 2007, the English Wikipedia page of Johannes Kepler has received more than 3,769,262 page views. His biography is available in 139 different languages on Wikipedia (up from 136 in 2019). Johannes Kepler is the 5th most popular astronomer (down from 3rd in 2019), the 31st 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 5 out of 532Before him are Galileo Galilei, Nicolaus Copernicus, Giordano Bruno, and Ptolemy. After him are Tycho Brahe, Anders Celsius, Edwin Hubble, Aristarchus of Samos, William Herschel, Ulugh Beg, and Hipparchus.

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Among people born in 1571, Johannes Kepler ranks 2Before him is Caravaggio. After him are Abbas the Great, Hasekura Tsunenaga, Michael Praetorius, Mulla Sadra, Emperor Go-Yōzei, Thomas Mun, Frederick de Houtman, Willem Blaeu, Ferdinand, Prince of Asturias, and Salomon de Brosse. 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, Johann Schein, Henry Briggs, Agrippa d'Aubigné, Christian I, Prince of Anhalt-Bernburg, Gioachino Greco, Fede Galizia, Esaias van de Velde, and Salamone Rossi.

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In Germany

Among people born in Germany, Johannes Kepler ranks 31 out of 5,289Before him are Anne Frank (1929), Robert Schumann (1810), Heinrich Himmler (1900), Martin Heidegger (1889), Thomas Mann (1875), and Hermann Hesse (1877). After him are Erwin Rommel (1891), Wilhelm II, German Emperor (1859), Friedrich Schiller (1759), Bertolt Brecht (1898), Karl Dönitz (1891), and Felix Mendelssohn (1809).

Among ASTRONOMERS In Germany

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