ASTRONOMER

Ole Rømer

1644 - 1710

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Ole Christensen Rømer (Danish: [ˈoːlə ˈʁœˀmɐ]; 25 September 1644 – 19 September 1710) was a Danish astronomer who, in 1676, first demonstrated that light travels at a finite speed. Rømer also invented the modern thermometer showing the temperature between two fixed points, namely the points at which water respectively boils and freezes. Rømer made his discovery regarding the speed of light while working at the Royal Observatory in Paris and studying Jupiter's moon Io. He estimated that light takes about 11 minutes to travel from the Sun to Earth. Read more on Wikipedia

His biography is available in different languages on Wikipedia. Ole Rømer is the 18th most popular astronomer (down from 14th in 2019), the 20th most popular biography from Denmark (down from 18th in 2019) and the most popular Danish Astronomer.

Ole Rømer was a Danish astronomer who is most famous for calculating the speed of light.

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Among ASTRONOMERS

Among astronomers, Ole Rømer ranks 18 out of 644. Before him are Hipparchus, Ulugh Beg, Ja'far al-Sadiq, Edwin Hubble, Giovanni Domenico Cassini, and Nicolas-Louis de Lacaille. After him are Joseph Hooton Taylor Jr., Carl Sagan, Avempace, Aryabhata, Caroline Herschel, and Abd al-Rahman al-Sufi.

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Contemporaries

Among people born in 1644, Ole Rømer ranks 3. Before him are Matsuo Bashō, and Antonio Stradivari. After him are Henrietta of England, Louise de La Vallière, Heinrich Ignaz Franz Biber, Marie Jeanne Baptiste of Savoy-Nemours, Galdan Boshugtu Khan, Jakob Ammann, Louis-François de Boufflers, François de Neufville, duc de Villeroy, and Amcazade Köprülü Hüseyin Pasha. Among people deceased in 1710, Ole Rømer ranks 1. After him are Louise de La Vallière, Emperor Higashiyama, Hennig Brand, Duchess Charlotte Felicitas of Brunswick-Lüneburg, Bernardo Pasquini, Gaspar Sanz, Louis, Prince of Condé, Gottfried Kirch, and Henry, Duke of Saxe-Römhild.

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In Denmark

Among people born in Denmark, Ole Rømer ranks 20 out of 1,032. Before him are Christian VIII of Denmark (1786), Maria Feodorovna (1847), Sigrid Undset (1882), Johannes V. Jensen (1873), John, King of Denmark (1455), and Ivar the Boneless (900). After him are Christian VI of Denmark (1699), Gorm the Old (900), Christian II of Denmark (1481), George I of Greece (1845), Ubba (1000), and Sweyn Forkbeard (960).

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Among ASTRONOMERS In Denmark

Among astronomers born in Denmark, Ole Rømer ranks 1. After him are Ejnar Hertzsprung (1873), John Louis Emil Dreyer (1852), Peter Andreas Hansen (1795), Christen Sørensen Longomontanus (1562), Richard Martin West (1941), Holger Thiele (1878), Julie Vinter Hansen (1890), and Anja Cetti Andersen (1965).

Danish born Astronomers

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