I bumped into my friendly Astrophysicist at lunch and asked, "Is the
Universe Rotating?"
I will paraphrase his response; It could be rotating, but the rotation is
zero. The universe is Isotropic. The metric for the universe is uniform in
every direction. If it were rotating then it would have some preferred
axis. The Models of a rotating universe are called Bianchi's models, and a
rotating universe is called a Bianchi Universe, after the Italian
mathematician Luigi Bianchi.
The properties of the Cosmic Microwave Background Anisotropies (CMBA)
suggest some possible Bianchi models with rotation. However the
cosmological data gives this rotation as zero. So the universe has a
homogeneous, isotropic model. No rotation. https://en.wikipedia.org/wiki/Luigi_Bianchi
- JZ
--
Gerald Zani
Senior Engineering Technician
Brown University School of Engineering
(401) 863-9571