Light Speed
There's no way to Measure the Speed of Light in a Single Direction
A new study shows that not even cosmology can verify Einstein's assumption about the speed of light.
M87’s Black Hole is Firing Out Jets that Travel 99% the Speed of Light
Can black holes be famous? If they can, then the one at the heart of the M87 galaxy qualifies. And…
How Far Does Light Travel in a Year?
Light travels at a speed of 299,792,458 m/s (1080 million km/h; 671 million mph), which works out to about 9,460.5…
Finite Light — Why We Always Look Back In Time
Light's finite speed make all gazing a ride in a time machine. Only a photon truly lives in the moment.
When Was the First Light in the Universe?
When was the first time that the Universe cooled down enough that light could finally move around?
What is the Speed of Light?
Since the late 17th century, scientists have been attempting to measure the speed of light, with increasingly accurate results
How Can Space Travel Faster Than The Speed Of Light?
Cosmologists are intellectual time travelers. Looking back over billions of years, these scientists are able to trace the evolution of…
Special Relativity May Answer Faster-than-Light Neutrino Mystery
[/caption] Oh, yeah. Moving faster than the speed of light has been the hot topic in the news and OPERA…
Faster Than The Speed Of Light… OPERA Update
[/caption] A few days ago, the physics world was turned upside down at the announcement of "faster than the speed…
Breaking the Speed of Light
[/caption] It's been a tenet of the standard model of physics for over a century. The speed of light is…