Bangalore International Public School - 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
![Ole Rømer's use of the eclipses of Jupiter's satellites to measure the speed of light (1675). Ole Rømer (1644-1710) a Danish astronomer. Dated 18th century Stock Photo - Alamy Ole Rømer's use of the eclipses of Jupiter's satellites to measure the speed of light (1675). Ole Rømer (1644-1710) a Danish astronomer. Dated 18th century Stock Photo - Alamy](https://c8.alamy.com/zooms/9/03bca40d47b745cea11cf35ffe5c51a0/mr6jg1.jpg)
Ole Rømer's use of the eclipses of Jupiter's satellites to measure the speed of light (1675). Ole Rømer (1644-1710) a Danish astronomer. Dated 18th century Stock Photo - Alamy
![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
![Ole Ro/mer, the speed of light, the apparent period of Io, the Doppler effect, and the dynamics of Earth and Jupiter | Semantic Scholar Ole Ro/mer, the speed of light, the apparent period of Io, the Doppler effect, and the dynamics of Earth and Jupiter | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/7d36f0888edba1150b9bc5413edbd72db4a22e93/2-Figure2-1.png)