sentence1: so the cmb velocity is the motion of the solar system with respect to space universally , but not necessarily with respect to the local space .
sentence2: the cmb velocity is a measure of the motion of the solar system relative to the universe as a whole , or aleast a shell of the universe some 15gyrs away , and indeed the near uniformity of that radiation in all directions demonstrates that we may meaningfully refer to the spatial structure of the universe .