Q:  What is the velocity of this galaxy
      away from the Sun?

            If rest wavelength = 396.8 nm
                obs wavelength = 484.1 nm

            then

                 shift = 87.3 nm

                          shift 
                v  =  ---------------  *  c
                      rest wavelength

                   =   66,000 km/s    approx


      Estimate the distance to this galaxy.

             Using a value of H = 70 km/s/Mpc,
             we find

                         v         66,000 km/s
                 d  =  -----  =   -------------
                         H         70 km/s/Mpc


                    =    940 Mpc     apporx