One thing about TOS that has often bothered me a little bit, especially when put up with the later shows, is how the USS Enterprise was able to travel as far as the edge of the galaxy and back in episodes such as Where No Man Has Gone Before, Is There No Truth in Beauty?, and By Any Other Name, whereas later series establish that it would take decades at least to undertake such a journey with warp drive? By all acounts, known space simply isn't anywhere near the galactic edge, otherwise the USS Voyager would've had a LOT longer than seventy years to get back home from the Delta Quadrant. Heck, the speeds Enterprise must have travelled in TOS, Voyager should have been able to get back within a week!! I just wondered if anyone has given some serious thought to this problem, and how to reconcile it?