- #1
Orion1
- 973
- 3
According to my understanding of the LCDM Friedmann–Lemaître–Robertson–Walker metric, the Universe under such a metric model is homogeneous and isotropic, and does not have any spin rotation.
Friedmann–Lemaître–Robertson–Walker metric:
[tex]c^{2} d\tau^{2} = -c^{2} dt^2 + a(t)^2 \left(\frac{dr^2}{1 - k r^2} + r^2 d\theta^2 + r^2 \sin^2 \theta \; d\phi^2 \right)[/tex]
Galaxies spin, stars spin, planets spin, and particles spin. So, why not the whole Universe?
Why would the Universe Big Bang not have any strong angular momentum and rotational energy on a vast scale?, or at least powerful vortices?
Reference:
Friedmann–Lemaître–Robertson–Walker metric - Wikipedia
Solving Einstein's field equations - Universe - Wikipedia
Detection of a Dipole in the Handedness of Spiral Galaxies with Redshifts z ~ 0.04 - Longo - Department of Physics, University of Michigan
Is the Universe Spinning? - news.discovery.com
Friedmann–Lemaître–Robertson–Walker metric:
[tex]c^{2} d\tau^{2} = -c^{2} dt^2 + a(t)^2 \left(\frac{dr^2}{1 - k r^2} + r^2 d\theta^2 + r^2 \sin^2 \theta \; d\phi^2 \right)[/tex]
Galaxies spin, stars spin, planets spin, and particles spin. So, why not the whole Universe?
Why would the Universe Big Bang not have any strong angular momentum and rotational energy on a vast scale?, or at least powerful vortices?
Ref. 4 said:Looking northward, above the plane of our Milky Way, he found that more than half of the spirals were spinning in a counterclockwise direction in the sky. This overabundance seems small, only seven percent of the total observed galaxy sample. But the odds of it being purely due to chance are a one in a million say the researchers.
If the whole universe is rotating, then an excess number of galaxies on the opposite part of the sky, below the galactic plane, should be whirling in a clockwise direction. And indeed they are according to a separate 1991 survey of 8287 spiral galaxies in the southern galactic hemisphere.
Reference:
Friedmann–Lemaître–Robertson–Walker metric - Wikipedia
Solving Einstein's field equations - Universe - Wikipedia
Detection of a Dipole in the Handedness of Spiral Galaxies with Redshifts z ~ 0.04 - Longo - Department of Physics, University of Michigan
Is the Universe Spinning? - news.discovery.com