The local streaming motions of galaxies are too high for a finite universe that is supposed to be everywhere uniform.

The local streaming motions of galaxies are too high
for a finite universe that is supposed to be
everywhere uniform.

In the early 1990s, we learned that the average redshift for galaxies of
a given brightness differs on opposite sides of the sky. The Big Bang
interprets this as the existence of a puzzling group flow of galaxies
relative to the microwave radiation on scales of at least 130 Mpc.
Earlier, the existence of this flow led to the hypothesis of a “Great
Attractor” pulling all these galaxies in its direction. But in newer
studies, no backside infall was found on the other side of the
hypothetical feature. Instead, there is streaming on both sides of us
out to 60-70 Mpc in a consistent direction relative to the microwave
“background.” The only Big Bang alternative to the apparent result of
large-scale streaming of galaxies is that the microwave radiation is in