The Niels Bohr Archive
History of Science Seminar
Mon 07 April 2014, 14.15
Aud. A, Niels Bohr Institute
Blegdamsvej 17, Copenhagen

Mads Peter Macholm
Gl. Hellerup Gymnasium


The Mechanical Empiricist:
Ole Rømer (1644-1710) in the Scientific Revolution

The Danish astronomer and civil servant Ole Rømer is well known for providing experimental evidence of the finite speed of light in 1676. His search for a stellar parallax and his work on thermometry are also among the highlights in his career. But Rømerís contributions cannot be seen as separate and mutually independent scientific achievements. I will argue in this lecture that there is a coherent picture behind all of Rømerís work.

I will follow Rømer during, first, his early years in Copenhagen working on Tycho Braheís observations, then his very important years at the Académie Royale in Paris in the company of Jean Picard, Cassini and Christiaan Huygens, and, finally, his mature years in Copenhagen, solving problems for the Danish kings and practising science in his spare time Ė carrying out a small revolution in observational astronomy in a small wooden house outside Copenhagen in 1704.

This was during the last years of the scientific revolution. Was Rømer part of this giant leap in human thought and scientific practice? To answer that question we will have to define what the scientific revolution was. There are multiple definitions, and I will "test" three of them on Ole Rømer, asking whether he represented any of them.


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