In popular science around 70% of the total energy in the universe is dark energy. I’m a little bit confused regarding what this energy does. Does it influence all matter with a pushing force to make the expansion of the universe accelerate or does it create new space time fabric? I guess that it must be the latter because otherwise the energy will be restricted to pushing the galaxies apart from each other no faster than the speed of light. If new space time fabric is created by this energy how do you calculate how much energy is needed? Do we know how to create new space time fabric and how much energy is needed?