Q:  What is the time and location of
      this celebration, according to the
      planet-based observers?


         Earth frame:   x2  =  0

                        t2  =  1 yr                           Jan 1, 2500



  Q:  What is the time and location of
      this celebration, according to the
      Red Navy ship which is passing by?
 

        Ship frame:    x2'  =  gamma * (x2 - v*t2)  
 
                            =  2.294 * (0  - 0.9*1)  =   
                        
                            =  -2.06 yr

                       t2'  =  gamma * (t2 - (v*x2)/c^2)

                            =  2.294 * (1  - (0.9*0)/1^2)

                            =  2.294                           Apr 17, 2502