How? Well according to Einstein's math, if space is uniformly filled with an invisible energy, sort of like a uniform, invisible mist, then the gravity generated by that mist would be repulsive, repulsive gravity, which is just what we need to explain the observations.
Kako? Prema Einsteinovoj matematici, ako je svemir ravnomjerno ispunjen nevidljivom energijom, nečim nalik jednoličnoj, nevidljivoj magli, gravitacija koju ta magla proizvodi bila bi odbojna, odbojna gravitacija, a upravo nam to treba kako bismo objasnili ta zapažanja.