We undersand now how [time dilates](http://diary.febdian.net/archives/2005/05/18/how-time-dilates/ “Diary, 18 May 05″) due to motion with (closing to) speed of light. We could continue from that understanding point to explain how space contraction happens then. The easiest way to do that is to use [Lorentz Transformation](http://casa.colorado.edu/~ajsh/sr/construction.html#lorentz “Prof. Andrew Hamilton’s WebSite”). It’s clear mathematically and also physically. But since we don’t use that mathematics from the very...