In article <
mt2.0-24633...@hydra.herts.ac.uk>, Eric Flesch
<
er...@flesch.org> writes:
> Setting aside Turyshev et al for now, I would like to point out an
> interesting aspect of the anomaly. Pioneer's speed at 20AU was
> 12500m/s. so the distance-traversed anomaly per second was 9x10^-10 /
> 12500 = 7x10^-14 as a ratio. Now 20AU = 3x10^9 km, so let's divide
> this by the ratio we've just calculated => 4.5x10^22 km => 5x10^9 LY,
> which is close to the Einstein Radius of a static universe model. Now
> how did that happen?
About a year ago, Mike Turner gave a talk at the RAS. It was supposed
to appear in Astronomy and Geophysics (I don't know if it has). I
wasn't at the talk, but could read the discussion (Meeting of the Royal
Astronomical Society, The Observatory, 132, 57, 2012). Turner mentioned
that, although q (the deceleration parameter) evolves with time, its
average over the previous history of the universe is very close to 0.
However, since it is now negative and will remain negative, this is not
only a "coincidence", but a coincidence which holds only now. (Another
way of looking at it: the age of the universe is very close to the
Hubble time, because the periods of deceleration (making the universe
younger than the Hubble time) and acceleration (making the universe
older than the Hubble time) cancel out---now; in the future, when the
universe will always accelerate, they never will again and the universe
will always be older than the Hubble time. This has also been pointed
out recently by other authors (
http://arxiv.org/abs/1001.4795). During
the discussion, Donald Lynden-Bell asked "Are you worried about the
sizes of the Sun and the Moon?" Of course, he was pointing out the
remarkable coincidence that the angular sizes of the Sun and Moon are
almost the same and, what is more, since the Moon is moving away from
the Earth, are only the same now. Turner remarked "Well, the trouble
with coincidences is that sometimes they tell you something and
sometimes they don't."
Many theories are constructed to explain "cosmic" coincidences.
However, this rarely happens for the Sun-Moon coincidence, which is
similar in that it is unlikely and has no obvious explanation.
It would be very unlikely if there were NO coincidences. Explaining
them after the fact is not necessarily wrong, but needs to have strong
motivation in addition to explaining the coincidence. It is much better
for a theory to make predictions of such coincidences and other
interesting things which are not natural outcomes of other theories
before these things have been observed.
> However, high-precision measurements of the Galilean
> satellites would demonstrate the presence of the redshift, much as
> they were originally used to demonstrate the speed of light.
Do you have some numbers? Can this be measured now? What about using
OUR Moon?
> All going well, I'll shortly put up a posting titled "Through the
> Looking Glass, Redly" which describes the 1/z static universe model
> which explains the whole picture including the CMB radiating from the
> apparent edge of the universe where infinities clash.
Various authors have proposed static cosmological models in the past.
Be sure to indicate where yours differs and which predictions (better
than postdictions) are unique to it.