WaveRider

Doesn't mapping the universe in "real time" have a problem with the relativity of time? If you try observation measurement conversions based on the movement of particles, e.g., photons, aside from all the correction calculations (e.g., for lensing) you still have no way of relating time there to time here--except as it is done now. Isn't "A billion light years" from here "real" time there measured in time units and standards from here?