1676年,丹麦天文学家Ole Christensen Ro

1676年,丹麦天文学家Ole Christensen Romer(Roemer)根据对木星最深处的卫星Io的观测得出每秒13万英里的光速。
原文:1676 Ole Christensen Romer (Roemer), Danish astronomer, derived a speed of light of 130,000 miles per second based on his observations of Io, the innermost moon of Jupiter.