What nationality was the man who determined that light has a finite speed?
Ole Rømer Ole Christensen Rømer (] ; 25 September 1644 – 19 September 1710) was a Danish astronomer who in 1676 made the first quantitative measurements of the speed of light.
Rudolph Minkowski Rudolph Minkowski (born Rudolf Leo Bernhard Minkowski ; ] ; May 28, 1895 – January 4, 1976) was a German-American astronomer.