Still, the 900 years of observational lag in Trelane's view, in my mind has nothing to do with the Enterprise
's time lag.
"the time barrier's been broken!"
. From any planet anywhere, looking back on Earth from there would show images relative to how many light-years distant it is. For the Enterprise
also, once it arrives there, too. The ship basically comes from another time, and once there it 'abides by its rules'.
Am I missing something obvious? I still see it as the Enterprise
being from whatever century it was relative to the distance and speed of its journey to get there.