Quote:
Originally Posted by Hornblower
The geometric argument against this remark is almost absurdly simple.
If we are moving along a line toward a point, and a galaxy alongside is moving toward the same point, we will converge with it. No fancy calculation is needed to show this. A simple sketch will do.
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Your understanding is too simple.
If I (the observer ) am on Earth and everyone is moving away then they will meet at a point on the opposite side of the Earth to me.
I know they are moving away because of Doppler shift,radio or light.
If I (the observer ) am on an expanding Earth then everyone is moving away
but each says everyone else is moving away.
We all know others are moving away because of Doppler shift,radio or light,
and in the same direction and maybe at the same speed as in line 3,4,5.
Each may say that the others will collide at a point on the opposite side to where they are.
We may think we can calculate when the collisions will start but by then the
distance will be great enough that ever more time is needed.
The collision point is always on the other side (from the observer) and is always too far away.