The (Cosmological) Axis of Evil

We orbit a typical star, in a typical spiral galaxy, in a typical branch of a typical supercluster. Our planet and its evolutionary leap to intelligent beings could’ve occurred in any old spot around the cosmos and we ought to have come to the same conclusions about the big science questions: the Big Bang, dark energy, the cosmic web, the works.

When it comes to cosmology, two assumptions make the difference between a world of math-pain and math-paradise: that our universe is homogenous and isotropic.

What a wonderful testbed for our cosmological assumptions. We can ask, “Is the universe isotropic?” to the CMB, and it can answer. The response: Yes! The CMB is perfectly uniform all across the sky to one part in 10,000. Mission accomplished.



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