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Originally Posted by PITTSTON2SARASOTA
Great links..I thought I'd relink to a thread I started along similar lines to provide posters with additional links and more information...this phenomena still baffles me somewhat...but if the MULTIVERSE theory is correct, it all makes perfect sense now.
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Thanks for digging up that thread. I had forgotten about it although I remembered the subject had been discussed before.
What we see from the Dark Flow phenomena is what's happening. What we don't understand is why (what's causing it). A close encounter multiverse scenario is certainly a plausible explanation. What it really gets down to is a greater need to better understand the universe.
Some possible options ---
1. Bubble universes that are merging.
2. Megaverse. The structure of our universe might just be local, similar in some ways to galaxies or superclusters only much larger. Other universe structures are just too far to ever see, but one is close enough to exert a gravitational attraction pulling on galaxies and distorting our universe.
3. Colliding branes.
4. Some kind of entanglement of superstrings.
5. An exotic and as yet unknown force.
6. Some kind of remnant "turbulence" within the universe left over from the initial inflation phase of the Big Bang.
7. Some kind of localized flaw or rip in the "fabric" of space-time.
8. The universe might be propogating itself and forming a new universe.
9. It might be a copy of our own universe that's slightly out of dimensional sync enough to render it as invisible.
Whatever the cause is, the motion of the galaxies involved has been observed over a period of time. They're moving in the same direction as if something of enormous mass that's invisible or far beyond the observable universe is attracting them. While it suggests something beyond the observable universe is involved, we don't really know that to be the case. The best that can be done currently is to speculate. Apart from that it's just a weirdly unknown phenomena.
Before the first fly-by around Mars, we had no real idea exactly what the surface of Mars looked like. There were just guesses that it might be rather Earthlike in some ways. Instead, we found it looked a lot more like the Moon in many ways, full of craters, rocks, dust, and lifeless on the surface. No plants. No flowing water. No sign of any thriving Martian cities

. Although in some ways Mars is much more Earthlike than the other planets or the Moon, it's still an extremely hostile environment any way you look at it.
Unless a conclusive explanation about the "Dark Flow" has already been determined (and I don't think it has been yet), I'd be somewhat inclined to initially lean toward thinking it may be a phenomena within our own universe, such as example #6.