Hey, I've been trying to get my head around Special Relativity and I'm having some trouble with the Lorentz Transformations. I have the impression that the contraction of time, length, and mass are equal, but the contrary impression that the length contraction is an effect of *measurement* whereas time dilation is obviously (twin paradox) present. So if time really slows down, would an object actually compress? Or is the measurement, unlike time, the result of the light (perhaps distorted from motion of the object) reaching the observer? Thanks!