"breaking" the speed of light limit. I couldn't quite figure out how to describe it shortly hence the weird title. I was wondering what it would "look" like if the following situation happened. Lets say you have a space craft. It is going at a speed of 0.7 c. in relation to star X. Accoording to special relativity (or was it general relativity?) you could also say your spacecraft is not moving and star X is heading in the opposite direction at a speed of 0.7c.. Correct? But, in "reality" you are the one moving.. Now.. There is another spacecraft heading in the opposite direction at a speed of 0.7c in relation to the same star. The spacecraft meet... So.. you get the folowing situation.. a = Spacecraft A b = Spacecraft B c = stationary star. a ====> c <=== b The velocity difference is 1.4c.. more then the speed of light.. Now I understand that none of the spacecraft is actually moving faster then the speed of light, but from what I understand it is fair to say that spacecraft A has velocity 0c and B has velocity 1.4c. What would that look like from the perspective of spacecraft A? How could that possibly be turned that B has a velocity of <1c? I hope I'm making myself clear. I'm heaving a bit of difficulty trying to formulate my question.