RE: Is "empty space" empty (only reasonable answers)
June 23, 2014 at 1:06 am
(This post was last modified: June 23, 2014 at 1:08 am by Anomalocaris.)
(June 23, 2014 at 12:22 am)Wyrd of Gawd Wrote: Seeing that galaxies are constantly merging the idea of an expanding universe seems illogical.
Huh?
The effect of gravity between any two groups of galaxies declines with square of distance between them. The effect of expansion of space between two groups of galaxies increases with distance between them.
So galaxies groups separated from each other by short distances, say millions to hundreds of millions of light years, tend to attract each other as strongly or more strongly than expansion of space would push them apart. So they tend to clump together under gravity in defiance of expansion of universe
Galaxies groups separated from each by great distances, say billions of light years, are unable to attract each other more strongly than expansion of space would push them apart. So they separate as expansion of universe overwhelms their mutural gravitational attraction.
