[SmootSmack]

Originally Posted by GhettoDogAllStars

Yeah, and there'd be time dilation, as steveo alluded to. I'm not sure of the math, but imagine orbiting Earth at the speed of light for a few weeks. Years would have passed on Earth, but for you it has only been a few weeks.

This is basically what makes long-distance space travel impractical. If we were able to travel the speed of light, it'd still take a lifetime to reach the nearest galaxy. All the while, time would be passing much quicker on Earth. So, if it takes 75 years at the speed of light to reach Andromeda, thousands of years could be passing on Earth during your voyage. Hell, the human race could become extinct before you even reached your destination. Warp drive is the only way!

It's what also makes it highly unlikely that if there were life outside of earth (civilized life) that we could ever communicate with them. Because they're either way way way ahead of us, or us of them.