Everybody here is talking about the black hole hypothesis, but to me it seems that the other explanation, a wrong assumption about the rotation of our own galaxy, is more likely: because it could explain 2 other problems as well.
> "The re-calibration of distance measurements can also explain several other unsolved questions in cosmology such as the differences in the expansion rates of the universe and the large galaxies that according to the existing distance measurements are expected to be older than the universe itself.”
> "The re-calibration of distance measurements can also explain several other unsolved questions in cosmology such as the differences in the expansion rates of the universe and the large galaxies that according to the existing distance measurements are expected to be older than the universe itself.”