The speed of light has been one of science’s most trusted markers of stability. For more than a century, the idea that light ...

We live on a planet that seems motionless, yet Earth orbits the Sun at a dizzying speed, and our entire Solar System moves through the galaxy. But how fast exactly are we traveling through ...

Here is a thought experiment for you: imagine shining a powerful laser at the moon, the beam cutting through space until it lands on its dusty grey surface. Now flick the laser so the spot of light ...

If there is an absolute law in the universe, it’s that nothing can travel faster than the speed of light. For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of ...

They recreate how a camera would see objects traveling at 99.9% of the speed of light, revealing surprising relativistic ...

CC0 Usage Conditions ApplyClick for more information. Imagining travel across the immense distances in outer space required envisioning fictional methods of faster-than-light-speed travel. Whether ...

Cosmic speed limits can be a major inconvenience but they've rarely stopped science fiction in its tracks. When it comes to space travel, Albert Einstein's theory of relativity is a major ...

When I was a teenager, I was—shockingly, I know—deeply nerdy. At a science-fiction convention, I bought a button that read, “186,282 miles/second: Not just a good idea, it’s the law.” It was poking ...