Expansion of the Universe

I've been following the "Where did the matter and energy come from?" thread. And it touched on the expansion of the universe.
My understanding of this is that things aren't actually moving away from each other but space is actually expanding. We know this because objects that are farther away are moving away from each other faster than closer objects.

Do I understand this correctly and does this mean that objects like planets are expanding dimensionally? I'm sure that the size of material objects, even stars, is so small that it would be impossible to measure but over billions of years would there be a mearurable expansion in something the size of a planet?

There's no clear line of demarcation because with increasing distance the effects of gravity diminish gradually while those of expansion increase gradually. The larger the scale the more easily expansion will win out over gravity.I was just responding to your statement that, "Objects farther away move faster away from us then closer objects, but not from each other." All observers in the universe would see precisely the same thing that we see from our vantage point here on Earth, that the further away an object is the faster it is retreating. This is because all points in space are retreating from all other points in space, but what's contained in that space, such as light and matter, will have their own motions and will attract each other gravitationally.

I think NoNukes and I agree with Cavediver that as observed from Earth,

Along a single line of sight this would be true, trivially true in fact. It wouldn't be possible for it to be any other way.

It isn't true at all. Assuming that the expansion is isotropic, then space between the pair of points expands at a rate proportional to the current separation of the pairs of points. The distance from us to the pair of points is not relevant.

And actually it is, observationally, but opposite to what has been suggested. Distant pairs of objects will be observed to expand away from each other more slowly than similarly separated pairs that are closer, as the more distant pair are being more red-shifted.

two distant objects at radial distances x1 < x2 will have a smaller measured radial Δv than two closer objects of the same radial separation.

Ignoring local motion, two objects at separation x from each other will be retreating from one another at the exact same velocity no matter where they are in the universe.

It seemed to me that there was some anbiguity about where we were disagreeing. In addition to the discussion about expansion effects, there was also the mention of Andromeda. At the time I made my comment, I was pretty sure you and I were saying the same thing and that your comment re Andromeda was tongue-in-cheek.I accept that Cavediver and Percy's current statements regarding radialy motion are correct, as were yours and mine to the extent that we were talking about actual separation distances. It also seems likely that any apparent disagreement between your position on rates of expansion and Percy's were miscommunications.