Danish astronomer (1644-1710) who demonstrated conclusively that light travels at a finite speed. Also invented the "Meridian Circle" instrument for charting star positions in the sky.
Catalog of the Scientific Community: Roemer, Ole Christensen
Background data on the scientist.
Rundetaarn: Centuries of Astronomy in Denmark
Includes section on Rømers works.
Wikipedia: Ole Rømer
Short crosslinked encyclopedic article.
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Last update:September 23, 2013 at 5:35:04 UTC