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.

4 years ago

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…

5 years ago

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…

7 years ago

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.

7 years ago

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?

8 years ago

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

8 years ago

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…

9 years ago

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…

13 years ago

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…

13 years ago

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…

13 years ago