4 ms·

Well, another implicit barrier is human lifetime. Though I suppose if we don't mind massive time dilation, we might not mind thousands of generations passing by

• xenadu02 6y ago
  That's not correct. If you could accelerate to a significant fraction of c then you can traverse the Milky Way well within a human lifetime from your point of view. Hundreds of thousands of years will pass on earth and your destination while you travel, but it's not a problem for the passengers.
  • edgyquant 6y ago
    Right if which is almost certainly not possible for a human to do
  • Dylan16807 6y ago
    Depends on your acceleration and whether "traverse" means you get to skip around a bunch of destinations or only make a single direct trip. If your acceleration is somewhere between .5G and 2G then every single hop costs a significant chunk of your lifetime, even if those hops can reach extremely far.