“The Great Void” — In a Massive Region of Space, Astronomers Find Far Fewer Galaxies Than Expected

 

Scientists have known that more than 12 billion years ago, about 1 billion years after the Big Bang, the gas in deep space was, on average, much more opaque than it is now in some regions, although the opacity varied widely from place to place. But they weren’t sure about what caused those variations.

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