On this day in 1644 - September 25th - Danish astronomer Ole Christensen Rømer was born.
He demonstrated that light travels at a finite speed. He did this measuring the length of time between eclipses of Jupiter by one of its moons when the Earth was at different distances from Jupiter.
We take forum safety very seriously here at BellaOnline. Please be sure to read through our Forum Guidelines. Let us know if you have any questions or comments!
Privacy
This forum uses cookies to ensure smooth navigation from page to page of a thread. If you choose to register and provide your email, that email is solely used to get your password to you and updates on any topics you choose to watch. Nothing else. Ask with any questions!
