In 1676 he made the first quantitative measurements of the speed of light.
Man did not invent light. Light has been around since the beginning of the universe. Man did; however, discover electricity, learn how to produce it, and invent the lightbulb over 150 years ago.
It was the wrong speed. His measurement of the period was off by a few seconds and he didn't have the exact length of 2 A.U. He did prove it was fixed and not infinite--like Galileo stated.
Sally Ride did not discover anything while in space.
No, sally did not discover anything in outer space.
Olaus Roemer discovered the speed light in 1676.
The Danish astronomer Olaus Roemer was the first to measure the speed of light. (within 25 % of the actual value)
It was the Danish astronomer, Olaus Roemer, who, in 1676, first successfully measured the speed of light. His method was based on observations of the eclipses of the moons of Jupiter (by Jupiter).
He met Olaus Roemer, a Danish astronomer living in Copenhagen, Denmark. He invented the alcohol thermometer and he realized the scale was unbalanced. So he decided to make his own thermometer and universal accurate scale.
Roemer was the first to measure the speed of light.
By Roemer, observing the moons of Jupiter.
Olaus Laurentii died in 1438.
Olaus Swartz was born in 1760.
Olaus Swartz died in 1817.