The theory states that as matter approaches the speed of light, the matter's mass becomes infinite. That means the speed of light functions as a speed limit for the whole universe. The speed of ...

Lightspeed travel is a popular concept in sci-fi and pop culture, but it's not a technology we are likely to see anytime soon ...

Laser scientists from Lawrence Livermore National Laboratory in California and the University of Rochester in New York have ...

On November 21, 1676, the Danish astronomer Ole Rømer discovered the speed of light. Before Rømer figured it out, scientists ...

Although they travel at the fastest possible speed (the speed of light,) they ... Its distance is 1500 light years, meaning that the light we see from it left more than a thousand years before ...

The speed of light is determined by the medium (material) through which the light is travelling. Light travels faster in a vacuum than it does in any other medium. Light changes speed as it passes ...