Incredible When Did Galileo Try To Measure The Speed Of Light References. Web galileo tried to measure the speed of light by having two people stand on hills about 5 km apart. In the 18th century, ole roemer calculated the speed of light by observing the eclipses of jupiter’s moon, io.

Web the first real measurement of the speed of light came about half a century later, in 1676, by a danish astronomer, ole römer , working at the paris observatory. The first real measurement of the speed of light came about half a century later, in 1676, by a danish astronomer, ole römer, working at the paris observatory. Each would hold a shuttered lantern.