We all know that the Star Wars movies take place "A long time ago, in a galaxy far far away". But relative to what?
The obvious answer is that it's relative to 20th-century Earth (21st for episodes 2 and 3).
But how plausible is it that both phrases might be relative to the place and time of some hidden narrator rather than the modern audience?
If the story is being told by someone in the distant future of the Star Wars universe (and George Lucas is re-telling that story), that opens the possibility that the humans we see are actually our distant descendants. For example, the events of the movies might take place 10,000 years in our future, after Earth humans have colonized other galaxies, and the story is being told by someone living, say, 10,000 years after that.
Are there any canonical sources and/or statements by George Lucas that clearly define what "A long time ago in a galaxy far, far away" actually means?
(My own thought is that placing the story in the distant past gives a more mythic feel.)