“It’s neither possible nor survivable to travel near the speed of light relative to our good old Earth,” the physicist says. Wonky theoretical explanations aside, it would simply take far ...

If an object travels at a relative speed, which is a non-negligible fraction of the speed of light, with respect to an observer, the length of the object in the travel direction will appear ...

One of Albert Einstein's greatest insights was realizing that time is relative. It speeds up or ... the closer we come to traveling at the speed of light (186,000 miles per second), the more ...