Accelerating Universe- an Illusion?

[Suzy]

It's interesting reading.
And now a "dark flow" is introduced. So many dark things now aren't there.


http://www.msnbc.msn.com/id/44690771.../#.Toceyuwxp54

Now, a new theory suggests that the accelerating expansion of the universe is merely an illusion, akin to a mirage in the desert. The false impression results from the way our particular region of the cosmos is drifting through the rest of space, said Christos Tsagas, a cosmologist at Aristotle University of Thessaloniki in Greece. Our relative motion makes it look like the universe as a whole is expanding faster and faster, while in actuality, its expansion is slowing down — just as would be expected from what we know about gravity.

[CraigS]

Originally Posted by Suzy

It's interesting reading.
And now a "dark flow" is introduced. So many dark things now aren't there.


http://www.msnbc.msn.com/id/44690771.../#.Toceyuwxp54

Interesting one Suzy .. have to hunt up the paper (maybe tomorrow).
There's been a fair amount of work done to conclude that we don't live in a void .. so why not a bubble, eh ?

In the meanwhile .. gotta love this quote:

While no one knows what dark energy is, or how we might find it, dark flow is merely movement.

Well now that's a nice clear distinction between the two eh ?

Say again … what's the difference between dark flow and dark energy ?

Cheers

[ZeroID (Brent)]

Beware the DARK Side young padawan .....


( Sorry, couldn't resist )

[Robh (Rob)]

Suzy, very interesting.

The dark flow concept has been lurking around for a few years.
See http://en.wikipedia.org/wiki/Dark_flow

I find it entirely feasible that matter should accrue variably about the universe; witness the formation of filaments of galaxies and huge bodies such as the Great Sloan Wall of galaxies. Perhaps there is an extraordinarily high-mass body of galaxies beyond our view causing us to flow in that direction even though the universe as a whole is slowing its expansion. In which the description "dark flow is merely movement" becomes self-explanatory.

Thanks for posting, Rob