Ole Rømer

✶September 25, 1644

†September 19, 1710

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About their life

Ole Christensen Rømer 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.

Danish astronomer (*1644 – †1710)

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Biography from the article Ole Rømer on the English Wikipedia, available under CC BY-SA 4.0.