Rømer's determination of the speed of light - Wikipedia
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
Exploring Roemer's Method for Determining the Speed of Light - Spitz, Inc. - A Cosm Company
Roemer's Speed of Light
Determination of the Speed of Light - Stock Image - C033/4488 - Science Photo Library
PhysicsLAB: Light Properties
You–Yes, You–Can Calculate the Speed of Light Using Jupiter | WIRED
Ole Roemer
Who first measured the speed of light? What method was used? | Astronomy.com