Given that OP - our observer - is presumably on earth, it's a different reference frame. We'll still have to account for the difference of "possibly weeks" and

Given that OP - our observer - is presumably on earth, it's a different reference frame. We'll still have to account for the difference of "possibly weeks" and and 18 hours. And it's a really sorry state of affairs for photons that their vacations pass instantaneously. (IOW: I was poking fun at the OPs statements of the photon travelling "possibly weeks", not making a statement of fact. I thought the "beaches of Neptune" bit gave it away, but I guess not)