Ghost cosmos

June 4, 2019

“Space is big. You just won’t believe how vastly, hugely, mind-bogglingly big it is,” wrote Douglas Adams in The Hitchhiker’s Guide to the Galaxy. “I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.”

But not only is space mind-bogglingly big, its mind-boggling bigness has an extraordinary consequence: most of the Universe we see in our telescopes is not really there… Read article

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