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Oort (other)
Jan Hendrik Oort ( or ; 28 April 1900 – 5 November 1992) was a Dutch astronomer who made significant contributions to the understanding of the Milky Way and who was a pioneer in the field of radio astronomy. ''The New York Times'' called him "one of the century's foremost explorers of the universe"; the European Space Agency website describes him as "one of the greatest astronomers of the 20th century" and states that he "revolutionised astronomy through his ground-breaking discoveries." In 1955, Oort's name appeared in ''Life'' magazine's list of the 100 most famous living people. He has been described as "putting the Netherlands in the forefront of postwar astronomy". Oort determined that the Milky Way rotates and overturned the idea that the Sun was at its center. He also analyzed the vertical motions of stars near the Sun, using this data to estimate the local gravitational field. He calculated how much mass must be present to account for the stellar motions perpendicular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franeker
Franeker (; ) is one of the eleven historical City rights in the Low Countries, cities of Friesland and capital of the municipality of Waadhoeke. It is located north of the Van Harinxmakanaal and about west of Leeuwarden. As of 2023, it had 13,015 inhabitants. World Heritage Site the Eise Eisinga Planetarium, established in 1781, is located in the city. History Early history Franeker was founded around 800 as a Carolingian stronghold. The name probably derives from ''Froon-acker'', meaning 'land of the lord/king'; the oldest street in the city is still called Froonacker. Beginning around the 11th century, Franeker developed into the administrative center of northern Westergoa. Franeker received City rights in the Netherlands, city rights in 1417, when it was recognised as an independent city and, through the ('Citizen's letter'), formally separated from the grietenij . Saxon period At the end of the 15th century, Albert III, Duke of Saxony, Albert, Duke of Saxony established ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
