New answers tagged

2

Yes and no. Yes, according to quantum field theory the vacuum has energy caused by fluctuations of quantum fields (or virtual particles, if you like), and that energy should behave much like the theoretical dark energy. But no, because the originally calculated value for the vacuum energy was 120 orders of magnitude higher than the observed value for dark ...


1

"Mass must curve the universe but the pressure due to energy density may curve the universe in the opposite direction, leading to a flat universe" This is not correct. What produces curvature is the total energy density of the universe (adding up the contributions from mass, radiation, and dark energy) relative to the critical density. If the total ...


Top 50 recent answers are included