A virtual vacuum exists in this universe, not a true vacuum:-http://www.newscientist.com/article/mg21328526.400-harnessing-the-quantum-power-of-empty-space.html?page=1

The outer space we live in is not a true vacuum. It is a vacuum with virtual quantum particles that pop in and out of existence:-http://www.scientificamerican.com/article.cfm?id=something-from-nothing-vacuum-can-yield-flashes-of-light&page=2-We don't get something from nothing, something is always there.