How fast could humans travel in space?
How fast could humans travel in space? Our progress in Space Travel: Currently, the fastest spacecraft can reach speeds of up to 692,000 kilometers per hour, which is still slower than the speed of light.
What is the speed of dark?
Most of us already know that darkness is the absence of light, and that light travelsat the fastest speed possible for a physical object. So, what does this mean? In short, it means that, the moment that light leaves, darkness returns. In this respect,darkness has the same speed as light.