Dear Alberito:

On May 8, 7:42*am, Albertito wrote:
On May 8, 3:35 wrote:
On May 8, 7:11 am, Albertito wrote:
On May 6, 10:34 wrote:
...
From that point of view, we'd wrongly conclude
that the Earth is not where it should be. IOW,
we would observe the Earth from a Pioneer
probe as orbitally decaying *toward the Sun.

No, following your "model", the Sun and all the
planets you are passing also are anomalously
accelerated away from you (Sunward).

That's what I said, an anomalous acceleration
toward the Sun.

Dude, did you read what I wrote? *The Sun is
acclerating away equally fast. *How can the
Earth "orbitally decay towards the Sun", if the
Sun is also accelerated away?

Well, there is a point called barycenter. We
would wrongly deduced from that Doppler effect
that both the Earth and the Sun are decaying
toward solar system barycenter.

The Earth Sun barycenter is well inside the Sun, to the tune of a few
hundred meters (I think). The acceleration the Pioneer spacecraft is
experiencing would have consumed that distance by now.

Now remember, we "saw" the Pioneer spacecraft getting anomalously
*closer*, not further. Did you get your signs right in the initial
post?

David A. Smith