On 2/20/18 11:41 PM, Steve Willner wrote:
In article ,
As Phillip wrote, the total masses of both baryonic and non-baryonic
matter are known with about 4% precision from the microwave
background measurements and other cosmological data. See Table 3 of
https://doi-org/10.1051/0004-6361/201525830
The same table shows baryonic mass known to about 1%. (In
interpreting the table, remember that h=0.6731 so h^2 = 0.453.)

Note the Table 3 Heading
Table 3. Parameters of the base =CE=9BCDM cosmology computed from the 2015
baseline Planck likelihoods, illustrating the consistency of parameters
determined from the temperature and polarization spectra at high multipoles.

The paper describing Corotating galactic satellite systems
https://arxiv.org/abs/1802.00081
provides a clue that present cosmological models
'base =CE=9BCDM cosmology' are wrong.

[[Mod. note -- More accurately, if correct, that paper suggests that
one or more of
* lambda-CDM cosmology
* our understanding of satellite galaxy formation
* our understanding of satellite galaxy dynamics
may be wrong.
-- jt]]

This is like Galileo observing the Jovian moons
that should not be there.