New Books in Science, Technology, and Society cover image

Roger Penrose, “The Cyclic Universe” (Open Agenda, 2021)

New Books in Science, Technology, and Society

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The Most Vibrant Thing I Can Think of on a Local Scale

Gravitational waves are usually extraordinarily weak. The major source of gravitational radiation is probably these encounters between black holes. This will mean that we have this gravitational radiation coming out from an encounter between black hole. And here we have the cross over surface, which should really be a three dimensional surface. That's us up here looking back. What we are seeing is the micro wave background,. That is a surface just after the big bang, where the radiation, the c m b, is coming from. Now, prior to that, we arvisaging a couple of galaxies have met, and the black holes have encountered each other. Is the radiation coming up from them? Well, that's lit

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