I've been learning about Special Relativity as a hobby for the past couple days and for the most part, I've been able to wrap my mind around several concepts (ah-ha moments are awesome) There are still a couple of things that just aren't making sense to me. I understand why time dilation and length contraction occur when the reference frame is moving in the same direction of travel as the light (chasing the light) but I don't understand why the speed of light measures constant if you are moving toward light that is also moving toward you? For example, a seemingly stationary space ship is passed by a moving space ship pointing in the same direction. When both ships appear to line up perfectly they fire a beam of light in the direction of travel. The beams of light travel at a constant speed, however, the distance between the light beams and the ships are different because one of the ships is in relative motion with the other. This is the part I DO understand and makes it makes perfect sense. If outgoing light has not reached a distance of 186,000 miles from a reference frame, then that reference frame has not experienced a second of time - time and distance adjust to meet light. Next is the part I don't understand. Imagine the same space ship scenario as above only this time, in addition to the two light beams fired by the ships, a light beam is also fired at the space ships from directly ahead and in the line of travel. So now the moving ship is chasing a light beam and moving to meet a light beam that is also racing toward him. How can he not measure the light racing toward him as faster than the one he's chasing? If time slows down to ensure the proper distance of light is achieved, then wouldn't the light racing toward him cover so much relative distance that the time second would have to go faster to adjust? How can time slow down and speed up at the same time. If I could figure this out I think I could realize simultaneity. I know I'm missing something really obvious, so please be nice. This is my 3rd day studying physics.