Dark Keeps Flowing
"Expansion of the Universe is not uniform. Individual motions of galaxies can oppose the Hubble flow, like trout swimming upstream. The Milky Way and thousands of other galaxies are falling at 600 km/sec toward an unseen mass called the Great Attractor. This object has the mass of 10^16 Suns or 100,000 galaxies! It may be a true Black Hole, so monstrously massive that nothing can escape. There is evidence of another Great Attractor some 700 million years away.
"These monsters could be common, yet they are not counted in mass surveys. The missing 2/3 ascribed to "dark energy" may be hidden from us. It is foolish to think that humans know all that is out there. That is like Wile E. Coyote, Super Genius not realising that he is falling into an abyss.
In September 2008 a paper by Alexander Kashlinsky of Goddard Space Flight Center reported a mysterious Dark Flow, drawing galaxies toward it. Huge clusters were reported moving at 600 km/sec in direction of the constellations Centaurus and Vela. Kashlinsky's results remain controversial; physicists Ned Wright claimed to find flaws in their analysis.
A month later another research group led by Mike Hudson from University of Waterloo reported that our region of the Universe is not expanding uniformly. One half of the sky appears to be expanding faster than the other half. Hudson's group concluded that massive, unseen structures exist in the Universe. These great attractors would not lie outside the Universe, but beyond our local group of galaxies. The tired old cosmological model can not account for such huge structures. Consistently Large Flows on Scales of 100 Mpc/h: A Challenge for the Standard LCDM Cosmology.
Last month Kashlinsky and colleagues published data indicating that the Dark Flow extends even further into Space. The new paper makes a strong claim that Dark Flow is real. Already it has led to speculation that the source of attraction is outside our Universe! Dark Flow can easily be explained by considering light.
Because the early speed of light was much larger, primordial Black Holes formed to immense size. These ultra-massive Holes cleared immense dark voids in Space. Today they would invisibly attract galaxies toward them, exactly as has been observed. Models can precisely predict the 71.62% proportion of this dark mass, precisely the amount found by WMAP. Though the dead old "LCDM" model can notaccount for Dark Flow, it can be explained in a Universe with a changing speed of light.