But it is space itself that is expanding, meaning that the distances between objects like galaxies increases with time.
So it's not that everything is moving away from each other, but that more space is appearing in between? If the void of space was filled with ping pong balls, would new ping pong balls be being created, or would the existing ping pong balls be stretched and expanded?
And, if an object was n light years from us, the light would take n years, plus a bit longer to adjust for the expansion of the universe?
And, is this only empty space that expands? Do atoms get slowly bigger, or do the electrons' orbits adjust and slowly everything solid rejiggers itself into keeping their relative positions because of gravity and other attractive forces? Is this smooth, or are there spacequakes?
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Brian
