Re: XMM-Newton probes formation of galaxy clusters (Forwarded)


Andrew Yee wrote:
> ESA News
> http://www.esa.int
>
> 31 August 2005
>
> XMM-Newton probes formation of galaxy clusters
>
> ESA's X-ray observatory, XMM-Newton, has for the first time allowed
> scientists to study in detail the formation history of galaxy clusters,
> not only with single arbitrarily selected objects, but with a complete
> representative sample of clusters.
>
> Knowing how these massive objects formed is a key to understanding the
> past and future of the Universe.
>
> Scientists currently base their well-founded picture of cosmic evolution
> on a model of structure formation where small structures form first and
> these then make up larger astronomical objects.

Thank you Andrew for your most valuable contributions to this group.
Q: If BB theory is correct, according to the above, galaxy clusters
should reduce in maturity/not be evident at large distances, so at what
distance are they observed?

Jim Greenfield
c'=c+v

.