(April 17, 2017 at 7:04 pm)Alex K Wrote: No, it needn't.
https://en.wikipedia.org/wiki/Void_(astr..._discovery
Quote:Voids are believed to have been formed by baryon acoustic oscillations in the Big Bang, collapses of mass followed by implosions of the compressed baryonic matter. Starting from initially small anisotropies from quantum fluctuations in the early Universe, the anisotropies grew larger in scale over time. Regions of higher density collapsed more rapidly under gravity, eventually resulting in the large-scale, foam-like structure or “cosmic web” of voids and galaxy filaments seen today. Voids located in high-density environments are smaller than voids situated in low-density spaces of the universe.[2][url=https://en.wikipedia.org/wiki/Void_(astronomy)#cite_note-2][/url]
