Quote:
Originally Posted by speedfreek
(snip)
But anyone in the universe who is looking at an object with a redshift of z=7 must be in a universe 7 times larger than it was when the light was emitted, so why should that light be considered to be unchanged in itself?
|
(I guess by "unchanged" you mean unstretched)
Being in a universe "7 times larger than it was .." . Do you mean by this that galaxies, stars, planets, men (if they existed at z=7), etc. must have expanded "sevenfold"?? I don´t think so. I understand that the expansion of the universe does NOT result in an expansion of its matter-constituents. If they don´t expand, why should light "expand"?