Astronomers identified “supervoid” holds clue to mystery of sky’s cold spot

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MEXICO: It is by some definitions the largest structure in the known universe, and it could also partially explain one of the mysteries of cosmology: why is one small patch of the sky too cold?
Astronomers have identified a “supervoid” — a vast region of the universe that is less dense than the area surrounding it. Located three billion light years away from us, this void has only a fifth fewer galaxies than would be expected, but because of its size it is 1.8 billion light years across that accounts for 10,000 galaxies.