allow for forward time travel. For example, if an astronaut travels close to the speed of light, they would age more slowly compared to people on Earth. This concept has been validated through ...

Albert Einstein didn't think so. His idea was that, theoretically, the closer we come to traveling at the speed of light (186,000 miles per second), the more time would appear to slow down for us ...

The observable universe is about 93 billion light-years in diameter.” This can be explained as the distance from the Earth to ...

A recent analysis envisions what it would be like to communicate with a spacecraft traveling close ... An object moving close to the speed of light experiences time dilation.

"Chemical rockets that we use today, even with the extra speed boost from flying by planets, or from swinging by the sun for a boost, just don't have the ability to scale to useful interstellar speeds ...