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Ole Rømer
1644 – 1710 · aged 66
Danish astronomer (*1644 – †1710)
- Born
- 25 Sept 1644 · Aarhus
- Died
- 19 Sept 1710 · Copenhagen
Life timeline
Their life from birth to death. On the timeline, world events of the time are shown faintly.
- 25 Sept 1644BornBorn in Aarhus
- 19 Sept 1710DiedDied in Copenhagen
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Biography
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 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. Using today's knowledge of the Sun-Earth distance, this would amount to a speed of light of approximately 220,000 kilometers per second, compared to today's accepted value of 299,792 kilometers per second.
In scientific literature, alternative spellings such as "Roemer", "Römer", or "Romer" are common.
Text from the Wikipedia article Ole Rømer, CC BY-SA 4.0
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