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Quote:
Originally Posted by renormalised
Let's do a little thought experiment here, ---Brian...try and follow me. Put yourself into the surface of a balloon. Now as it expands when the "big cosmic guy" blows it up (and ignoring where he is because you can't see or even know about him),
Ok that's my first problem... I do know about the cosmic big guy. The big guy is the Big Bang and BB is right smack dab in the middle of the balloon.
-look out into the space you occupy. What do you see??. Space is expanding away from you in all directions.
Now for my second problem... Space is indeed expanding away from me but not in all directions. As the balloon expands it brings what is above me closer to me.
-Now, leave a beacon where you are now and then move a distance "x" away in any direction you care to go within that space. Look around you and also look at the beacon you left behind were you once were. What do you see??. Space moving away from your new position in all directions, including the direction looking towards your beacon.
As long as I only think of the surface of the balloon I have no problem. But my mid keeps moving to the interior and to above the surface... sorry I do have a focus problem.
-That is what's meant by the "centre" of expansion is everywhere. Because you and every point in space is moving away from one another due to the expansion of that space. It's not only an expansion of physical dimensions, it's also an expansion in time and that's why it's difficult for some to visualise what's happening. Time, in this case, has to be visualised as an actual physical dimension like length and breadth in order for you to be able to see the results of the expansion.
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By an expansion in time do you mean that time itself expands as in a second is of greater duration or do you mean that there is a way to measure the expansion other than by how much space is occupied?
Brian