not if the universe is flat and simply connected (i.e, infinite): https://physics.stackexchange.com/questions/109063/how-come-that-an-infinite-universe-will-col

not if the universe is flat and simply connected (i.e, infinite): https://physics.stackexchange.com/questions/109063/how-come-that-an-infinite-universe-will-collapse-under-gravity https://physics.stackexchange.com/questions/109063/how-come-...