I presume the "Local Group" includes galaxies that are gravitationly attracted to each other.
If The Milky Way galaxy is being attracted to the Andromeda galaxy does that also mean that all the galaxies in the Local Group are being attraacted to one another or are they revolving around some central point and being held by mutual gravitation?
Gravity
For God's sake, man, that was your own thread. So hard to keep track of where you post? Use browser bookmarks. Aaargh..