Dear Joe Fischer:

"Joe Fischer" wrote in message
...
Dwhig265 wrote:
: Dear Prof. Wright,
: Thank you for taking the time to respond to a question from a person
that
: posts on sci.physics.relativity regarding z numbers. The argument ended
in a
: heated exchange and I ended up telling him you were wrong which was a
poor
: choice of words for which I apologize. I had told him that observations
of
: IaSne had proven conclusively that galaxies were moving apart at many
times
: light speed when the observational evidence only proves conclusive out
to the
: limit that we can see IaSne. I see no reason to conclude that the z
numbers
: would not hold true for greater distances. If you believe otherwise you
are
: free to do so and I will not say you're wrong, but I would ask for
: observational evidence.
: Respectfully, Dwain W. Higginbotham

Somebody was trying to say a couple of years ago
that z = 1 meant the speed of light, and that is not
true, z is a log function, and z numbers up to about
I think 5 have been observed, which is still not the
speed of light.

(1+z) is pretty close to gamma, for "local" objects. Gamma can be near
infinite, but doesn't require superlumenality.
http://www.astro.ucla.edu/~wright/cosmo_02.htm

David A. Smith