What is subspace?
According to the Encyclopedia, it is a continuum with different laws than our own. That doesn’t help much, considering you can makes fields of it in our universe. The best explanation I can come up with is that subspace is the “substrate” within which our universe exists. A subspace field is either a forced or natural intrusion of this domain into our own space, altering the behavior of things within our space-time. The “subspace barrier” is the albeit flimsy dividing line between the two continuums. Many things support this: in “Schisms” [TNG] creatures exist within a tertiary subspace manifold, a manifold being a term used to describe the form our own universe takes when viewed from a higher (theoretical) dimension. This is also called a deeper level of subspace; another universe which is connected to ours by subspace. In “Remember Me” [TNG] an entirely new universe was “spawned off” by a static warp bubble, and it was only accessible through subspace. The proto-universe in “Playing
