3 ms·
That would imply a preferred direction in the universe (the axis of rotation) and thus anisotropy. There are stringent constraints on anisotropy from the cosmi
by nodfyr 1y ago
That would imply a preferred direction in the universe (the axis of rotation) and thus anisotropy.
There are stringent constraints on anisotropy from the cosmic microwave background.
In particular, one can use the Doppler effect to check whether the CMB dipole is compatible with our velocity with respect to the CMB frame.
- gitaarik 1y agoWell, the universe has an axis, found in the CMB: https://en.m.wikipedia.org/wiki/Axis_of_evil_(cosmology) https://en.m.wikipedia.org/wiki/Axis_of_evil_(cosmology)
- jfengel 1y agoThe article says right up front that the universe does not have an axis: However, a 2016 study compared isotropic and anisotropic cosmological models against WMAP and Planck data and found no evidence for anisotropy.
- gitaarik 1y agoThat was only one observation, most of the observations do indicate there is an axis