(January 19, 2015 at 12:53 pm)Rhythm Wrote: 1000 years. Mostly because a lightyear is defined as the distance that light travels in a single year. If it travelled 1000 of those, it would have taken 1000 yearsI think you missed the part where I asked how much time passes in the photon's frame of reference?
(oversimplification of the situation, of course - might not have taken a straight-line course - the bodies are in motion - etc)
2nd question, from the photon's "perspective," what is the distance from the Sun to that distant moon (1000 light years away as measured from Earth's perspective)?