Recent content by GraemeSRC

Just back from reading your links. Intriguing. One illustration shows, in three steps, a photon traveling from a distant object to an observer, as space expands over time. The deduction given from this diagram is that the object is now 46 billion light years away as evidenced by the red shift...

Thank you Nugatory. So now I am visualising space-time as a sort of "massless fluid" that "holds" objects in position unless other greater forces act on them to cause motion in relation to it. Would this be a sensible albeit simplistic "visualisation"? How different would this "fluid" be from...

Just a small final thought before I head off to bed. About the OP's question of whether we can see our past. In fact that is all we can see. Its simply a question of how old what we see is. From the fact that light does take time to travel from the observed to the observer, however short the...

Hope nobody finds these couple of questions obnoxious. As the expansion of space-time carries apart the galaxies and the stars which make them up, does it also increase the separation of the planets within the planetary systems of those stars? Furthermore, does it also carry apart all the atoms...

In fact the string of marbles along a line from the centre to the edge of the sphere would retain their proportional spacing as you stretched them out. The rate is not less towards the centre. If they were evenly spaced to start with they would remain so.

The Russian analogy only holds if there are things one can say in Russian that are not translateable into English. Which I doubt.