Ole Christensen Römer - Research Article from Science and Its Times

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Ole Christensen Römer

1644-1710

Danish Astronomer and Physicist

Ole Römer is famous for demonstrating the finite velocity of light. He produced various scientific instruments including an improved micrometer, planetaria, the first transit circle, and an alcohol thermometer.

Römer was born on September 25, 1644, in Aarhus, Denmark. In 1662 he matriculated at the University of Copenhagen, where he studied astronomy and mathematics with Thomas (1616-1680) and Erasmus Bartholin (1625-1698). He lived at the home of Erasmus while a student, eventually becoming his personal assistant and marrying his daughter.

In 1671 Römer met Jean Picard (1620-1682) and accompanied him to the island of Hven to assist in redetermining the position of Tycho Brahe's (1546-1601) observatory Uraniborg. To this end they made measurements, in conjunction with those by Giovanni Domenico Cassini (1625-1725) in Paris, of a series of eclipses of Jupiter's moon Io...

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This section contains 602 words
(approx. 3 pages at 300 words per page)
Buy the Ole Christensen Römer Encyclopedia Article
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Ole Christensen Römer from Science and Its Times. ©2005-2006 Thomson Gale, a part of the Thomson Corporation. All rights reserved.
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