Search: calculator for long numbers.

(formerly)" dlzc1.cox@net wrote in message news:IDy1b.8763$Qy4.1287@fed1read05...
Dear George Dishman:

"George Dishman" wrote in message
...

(formerly)" dlzc1.cox@net wrote in message
news:GLc1b.6297$Qy4.6003@fed1read05...
...
Actually the behaviour is consistent with Dark Matter distributed near
the
periphery of the Solar System, adding to the mass inside the Solar
System.

Do you have a reference for that or can you show how it
leads to a constant acceleration?

I can show very little (since I care little for DM). The anomolous
behaviours of spiral galaxies is pretty much evenly distributed based on
distance, achieving approximately identical radial velocity regardless of
distance.

I think you mean constant orbital speed regardless of radius.

This would indicate a consantly increasing DM concentration,

For a point mass M, v(r) = sqrt(GM/r). For uniform density
(what I thought you meant by "pretty much evenly distributed
based on distance") v(r) = sqrt(4/3 pi G p) / r where p is the
density. To get v(r) constant you need the density of the DM to
fall as the square of the radius. However, clearly the orbits
of the planets do not behave that way.

constantly variable G (ala MOND to some extent), or some other thing.

If, in the case of Pioneer, the distribution is essentially apparently a
step change in G, then the distribution of DM, if that is the cause, would
be just "inside" the radius where the anomolous acceleration occurs.

As far as they can tell, the anomalous acceleration is constant
over the whole range where they can measure it. The lower limit
is simply where it gets swamped by the solar radiation pressure.

Assuming G is constant, then M_ss must increase (where M_ss is all the
known mass within that radius and DM).

It is also consistent with them hitting slower moving gases too.

Surely the density needed is far higher than the observational
limits.

I would think so, but this is one of the flavors of "reasons" I have read.
A decreasing mass density with increasing differential velocity would do
the trick. Not unreasonable, unless there was no change in the anomolous
acceleration across the orbit of planets (presumably swept by the planet)
or the "shadow" of planets (where the mass outflow was gravitationally
bound or at least deflected)

There is no change at all anywhere.

Solar wind, in some sense. Slower, cooler, expanding more and more slowly,
but less dense due to, well the usual culprits.

The Solar wind is thousands of times less than radiation pressure
and entirely negligible throughout the range.