“Now then: Whatever heavenly bodies those two glints represent, it is certain that the Universe has become so rarefied that for light to go from one to the other would take thousands or millions of years. Ting-a-ling? But I now ask you to look precisely at one, and then precisely at the other.” “OK,” I said, “I did it.” “It took a second, do you think?” he said. “No more,” I said. “Even if you’d taken an hour,” he said, “something would have passed between where those two heavenly bodies used to be, at, conservatively speaking, a million times the speed of light.” “What was it?” I said. “Your
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