
 Invariant Galilean Transformations (FAQ) On All Laws 
  In particular, the Principle of Relativity is embodied in the form of the Galilean transformation, which relates the original x, y, z, t to x', y', z', t' by the transform equations x'=xvt, y'=y, z'=z, t'=t in the simplified case where attention is focused only on transforming the xaxis, and not y and z. 
  As the transform equations say, the relationship of t', x' to t, x is based on the relative velocity between the two systems, but neither the original (eq99) equation nor the M observer equation is about a relationship between coordinate systems or observers. 
  Their process, which says (x'+vt') is the transform of x, says that (x'+vt') is the moving system location of x, but it can't be because x is moving further in the negative direction from the moving viewpoint. 
 www.cs.uu.nl /wais/html/nadir/physicsfaq/criticism/galileaninvariance.html (6572 words) 
