On Sep 26, 6:51 am, Johnnie In The Billows
wrote:
"In physical cosmology, dark flow is the collective velocity of galaxy
clusters over at least a billion light years that is independent of
the universe's expansion and does not change with distance."http://en.wikipedia.org/wiki/Dark_flow

This reminds me of the anomalous acceleration of the Pioneer
spaceprobes, which apparently doesn't change with distance either.

Yup, we're finding all kinds of anomalous aspects about gravity now
that we're actually "getting out there". I'm sure we're going to find
even more differences between our current understanding of gravity and
what it's actually like. Our current understanding of gravity is based
mainly on observations located on Earth and in the Solar System. It's
a bit like our knowledge of the world beyond what was explored, where
it was noted on maps, "Here there be Monsters". :-)