i brought this topic up in another forum and as it was a debate forum i didnt get much of an answer but, rather, a lengthy redundant argument between everyone. so im giving it a try here i dont have much knowledge with physics in general, and relativity is especially rough for me. that said it really interests me so if anyone can help me out with this question... and, maybe, dumb it down a bit id be in debt. if you are on a ship shooting through space at the speed of light and you aim a flashlight towards the front of the ship and turn it on will it ever reach the front? im under the impression that it will not because a beam of light cant travel at twice the speed of light. that is assuming that the speed of light is fixed. if im incorrect there then just ignore the rest of this: does the speed of our planet, our solar system, our galaxy come in to play with this? if we are spinning though the universe at, say, .5 light speed then wouldnt the speed of light from our perspective be only half of the actual speed of light? or does it affect it etc etc. also, as a complete different request, can you recommend a book about relativity and/or time that is for the lay person. time is a very interesting subject to me only because of the fact that not only can i not fathom the concept, but i dont think i can fathom fathoming the concept. thanks and this a really great place. i plan to be more active now that i've found it again. i signed up a year or two ago and just remembered it. i might not be too participatory as im not very informed on the topics but ill definately be an observer.