Add Yahoo as a preferred source to see more of our stories on Google. A photon experiences no time while crossing space, a result that reveals how relativity connects light, motion and the flow of ...

Add Yahoo as a preferred source to see more of our stories on Google. Light can travel billions of years yet experience no time. Here's how Einstein's physics explains it. (CREDIT: Shutterstock) A ...

A photon emitted from a star a billion light-years away arrives at a telescope having experienced no time whatsoever. Not very little time. None. That result is not a loose approximation or a poetic ...

A photon crossing a billion light-years experiences no elapsed time, even though its journey spans a billion years on Earth. That result comes directly from special relativity and exposes how ...