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Originally Posted by SpaceManAndrew
 if i remember rightly the theory of relativity is to do with the fact that you can't travel at the speed of light as energy=mass x (speed of light)squared.
if you work it out it says that as you go faster mass decreases but energy increases. so you'd need to be weightless in order to carry enough fuel to go at the speed of light. i think |
As an object approaches the speed of light its mass tends towards infinity. This means that the amount of energy required to keep it accelerating also tends towards infinity effectively making light speed travel impossible.