(December 22, 2011 at 2:52 pm)TheDarkestOfAngels Wrote: I don't remember precisely if it's referring to an 'observer' (as in a person) or the earth. Neither of which would make sense given that the earth is moving around the sun, the sun around the galactic core, and the galaxy itself and the local supercluster are all moving in independant directions.
Imagine the speed of light does depend on the observer. What would someone sitting on a distant star gazing at Earth see? Light from Earth arrives at the alien observer instantly, so he'll see us typing; but light from the star is moving at half light speed, so has not yet reached Earth at all from his perspective.
So he's seeing our Earth, but one where we have never seen the stars (remember light from us to him is instant, so he is not seeing some distant past where his starlight has not yet reached him, it has to be Earth now but without starlight).
Ding! Paralel universe created.
But remember, it's only a different way of measuring things. Right?
