{"id":19824,"date":"2020-10-20T10:21:47","date_gmt":"2020-10-20T08:21:47","guid":{"rendered":"https:\/\/rinconeducativo.org\/efemerides\/20-de-octubre-de-1728-se-pierden-todos-los-manuscritos-de-ole-romer-en-un-incendio-en-el\/"},"modified":"2024-09-16T13:51:11","modified_gmt":"2024-09-16T11:51:11","slug":"october-20-1728-ole-romers-manuscripts-lost-fire-copenhagen-observatory","status":"publish","type":"re_efemeride","link":"https:\/\/rinconeducativo.org\/en\/anniversaries\/october-20-1728-ole-romers-manuscripts-lost-fire-copenhagen-observatory\/","title":{"rendered":"October 20, 1728 \u2013 All of Ole R\u00f8mer's manuscripts are lost in a fire at the Copenhagen observatory"},"content":{"rendered":"
\n
\"Ole<\/figure>\n<\/div>\n\n\n

Ole R\u00f8mer <\/a>was a Danish astronomer known for being the first to determine the speed of light quantitatively.<\/p>\n\n\n\n

During the reign of Louis XIV, his minister Colbert was convinced of the importance of France becoming the leading scientific power and, with apparently unlimited funds, he managed to get prestigious scientists such as Christiaan Huygens<\/a>, Giovanni Domenico Cassini<\/a>, and Jean Picard<\/a>, to join the project. Louis XIV appointed Ole R\u00f8mer tutor to the Dauphin and made him a part of the construction of the magnificent fountains at Versailles.<\/p>\n\n\n\n

In 1676, when R\u00f8mer and Cassini made observations of Jupiter's first satellite at the Paris observatory, they saw that the eclipses with their moons differed from the predicted positions; specifically, they anticipated when the Earth approached the planet and delayed when it moved away. R\u00f8mer surmised that this was due to the finite time that light took to travel the (continuously variable) distance between Jupiter and Earth. With his telescope, he carefully studied Jupiter's satellite Io and estimated that it took 22 minutes for light to cross the diameter of the Earth's orbit (although modern estimates have managed to adjust the approximation to 17 minutes). that it takes for light to cross the distance that separates the Sun from the Earth was 8 m 13 s, while his disciple fixed it at 14 m 10 s.<\/p>\n\n\n\n

Taking this into account, using the recent estimate that Cassini had made of the distance to Jupiter and making precise calculations, he determined that the speed of light was 225,000 km\/s (it is currently known that he made an error of 75% concerning its real value because of the inaccurate knowledge of planetary distances in those times). In this way, he became the first to make the first quantitative measurements of the speed of light.<\/p>\n\n\n\n

If you want to know more about this scientist, click on the following link: Ole Christensen R\u00f8mer<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

October 20, 1728 \u2013 All of Ole R\u00f8mer's manuscripts are lost in a fire at the Copenhagen observatory.<\/p>\n","protected":false},"author":1088,"featured_media":10954,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[7566],"mes":[7218],"clasificacion_anterior":[],"class_list":["post-19824","re_efemeride","type-re_efemeride","status-publish","has-post-thumbnail","hentry","tag-energia-en","mes-october"],"acf":{"fecha":"17281020"},"yoast_head":"\nOctober 20, 1728 \u2013 All of Ole R\u00f8mer's manuscripts are lost in a fire at the Copenhagen observatory - Rinc\u00f3n educativo<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/rinconeducativo.org\/en\/anniversaries\/october-20-1728-ole-romers-manuscripts-lost-fire-copenhagen-observatory\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"October 20, 1728 \u2013 All of Ole R\u00f8mer's manuscripts are lost in a fire at the Copenhagen observatory - 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