Fisherman: " Empty space is something to put things in. It is not known if ES existed before the bb. I think that it did not exist--" very good thoughts in connection with this theme.
There has to be a distinction between intergalactical space, defined in three directions and its point of movement through time, and the void that existed before the beginning bb. Perhaps mass and Energy generate the space and it's field forces as it expands? or is space just an invisible 3 dimensional framework where to hang matter into? Invisible like the kingdom of 1914? would the gravity be strongest just "outside" the universe, as it is strongest just outside the surface of the Earth? falling off in strength toward infinity and to zero at the center?
For these reasons I picture a kind of Ur-space, Ur-time that filled and always has, -eternity.