Alpha point theory is a cosmological theory which postulates that not just space, but time and the higher dimensions as well, expanded in all directions (and dimensions) from a singular point in proto-spacetime, infinitely into the past and the future. According to the theory, though the temporal progression is infinite, the spatial progression may indeed be finite.
Several ancient races developed similar concepts, though the theory was first formalized in the late 22nd century by Dr. Gan Eltrin on Alpha Centauri IV. Receiving little acclaim at the time, the theory gained moderate popularity among the Federation scientific community in the following decades. (Star Trek: Pendragon)