"Scientists now believe that a tremendous amount of light that would otherwise be illuminating our universe is mysteriously absent.
How much light exactly? According to new research conducted by a team of international scientists and funded in part by NASA, the National Science Foundation and the Ahmanson Foundation, around 80 percent of the universe’s light is nowhere to be found.
“It’s as if you’re in a big, brightly lit room, but you look around and see only a few 40-watt lightbulbs,” astronomer Juna Kollmeier — a Carnegie Institution for Science professor and the lead author of the new study on missing light said in a statement this week. “Where is all that light coming from? It’s missing from our census.”
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http://rt.com/usa/171896-universe-light-photon-underproduction/