plenum

A filled space, or the concept of space as full of something. 1 a : a space or all space every part of which is full of matter b : an air-filled space in a structure; especially : one that receives air from a blower for distribution (as in a ventilation system) 2 : a general assembly of all members especially of a legislative body 3 : the quality or state of being full

Instead of thinking of the Universe as a vacuum dotted here and there with matter, consider it a plenum, a filled structure of space full of light, energy and particle/aniparticle pairs produced by the Zero Point Field fluctuation.