Traveling at the speed of light challenges the very laws of physics. Discover what happens to time, space, and matter as we ...

Communication is key. That’s true on Earth and it’s true in space. But in space, you need to contend with a crucial fact of ...

These waves do not arrive instantaneously. Although they travel at the fastest possible speed (the speed of light,) they take a while to get here. The universe is big, so the news is delayed by ...

In order to leave some time for delivering presents, this means Santa would need to travel at 5.1 million miles per hour (8.2 million kmph), or 0.8 per cent of the speed of light. That incredible ...

The blue and redshifted colours were calculated for Rudolph travelling at 10% of the speed of light. Brown is a tricky colour since it’s a de-saturated orange.

they can travel through a vacuum. Light from the Sun reaches Earth through the vacuum of space. The speed of light in air is very close to 300 000 000 m/s. which is nearly a million times faster ...

But did you know that light from an object travelling at high speeds changes colour? This is thanks to what’s called the Doppler effect – the way speed affects the length of waves, such as ...