![Illustration of Roemer's determination of the speed of light. In 1676 he observed a series of eclipses of the innermost satellites of Jupiter, which completes a revolution around the planet in 42 Illustration of Roemer's determination of the speed of light. In 1676 he observed a series of eclipses of the innermost satellites of Jupiter, which completes a revolution around the planet in 42](https://c8.alamy.com/comp/G15N98/illustration-of-roemers-determination-of-the-speed-of-light-in-1676-G15N98.jpg)
Illustration of Roemer's determination of the speed of light. In 1676 he observed a series of eclipses of the innermost satellites of Jupiter, which completes a revolution around the planet in 42
How did we first discover the speed of light? What experiments were conducted to determine its value? - Quora
![September 25, 1644 – Birth of Ole Rømer, the first to determine the speed of light - Rincón educativo September 25, 1644 – Birth of Ole Rømer, the first to determine the speed of light - Rincón educativo](https://rinconeducativo.org/wp-content/uploads/2020/09/romer_ole_experimento_0.jpg)