Explanation according to Quanum FFF Theory: Second generation giant dual black hole Herbig Haro system assumed to be found inside a proto cluster, possibly based on two growing central Black holes according to Quantum FFF Theory.. Zheng Cai, a postdoctoral fellow at UC Santa Cruz, said that they found the enormous nebula in the middle of a protocluster, near the peak density.
see : http://www.scienceworldreport.com/articles/57554/20170304/glowing-blob-mysterious-new-discovery-universe.htm
Glowing blob in distant galaxy puzzles scientists. (Image for representation only.)
(Photo : NASA.gov Video/YouTube screen
see also: http://news.ucsc.edu/2017/02/mammoth-nebula.html
MAMMOTH-1 is an extended blob of gas in the intergalactic medium called an enormous Lyman-alpha nebula (ELAN). The color map and contours denote the surface brightness of the nebula, and the red arrows show its estimated spatial extent. (Image credit: Figure 2 of Cai et al., Astrophysical Journal)