1. Grab the nearest book.
2. Open the book to page 123.
3. Find the fifth sentence.
4. Post the text of the next 4 sentences on your social media, along with these instructions, if appropriate.
5. Tag five people.
“The uniformity of the radiation is ‘a fossilized testament to the uniformity of both the laws of physics and the details of the environment across the cosmos’, and it is this homogeneity which, suggests Greene, makes it possible to meaningfully speak of a ‘universal synchrony’: ‘if the universe did not have symmetry in space – if, for example, the background radiation were thoroughly haphazard, having wildly different temperatures in different regions – time in a cosmological sense would have little meaning(FN5 – Brian Green, The Fabric of the Cosmos, Penguin 2004, 227-8).
RT: Yes, in fact the CMBR itself could be used by our so-moving observer to define a cosmic clock, obtained by measuring the uniform temperature of the microwave radiation and monitoring it as it cools down with the cosmic expansion. But even in the extreme case where you had a cosmological expansion that proceeded differentially in different directions, a so-called ‘anisotrophic universe’, instead of describing the expansion with just one number – redshift – then you would have one number for each direction. You could then possibly conceive of having different dimensions evolving differently with time.”
(Collapse, Vol 2, p123-4)
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