Dear Aardvark:

On Oct 7, 6:34*pm, Aardvark wrote:
* The Ping-Pong Ball and The Sun.

*[A mind experiment--Therefore, if
*you do not have a mind, forget it.]

Imagine a magical ping-pong ball
which is only affected by gravity.
That is its only quality. (Therefore
it can travel inside the Sun without
being destroyed.) Now...

Like Dark Matter.

This ping-pong ball is approaching
the surface of the Sun. As it does so
the pull of the Sun's gravity gradually
increases on the ping-pong ball.

* [When it is at the Sun's surface,
* the pull of the Sun's gravity on
* the ping-pong ball will be at its
* maximum.]

Actually, no. Even on Earth, with a roughly uniform density, g
increases for some distance below ground. The Sun's denisty increases
for as deep as we can receive light of any wavelength.

The instant the ping-pong ball plunges
past the surface of the Sun, the pull of
the Sun's gravity on the ping-pong ball
will begin to decrease.

At some distance below the surface, but OK.

* [This is because as the ping-pong ball
* travels closer and closer to the center
* of the Sun: the mass pulling on the
* ping-pong ball is decreasing, all the time
* that there will be a growing amount of
* Sun-mass behind it pulling back on it.]

"differential" or "un-offset" mass decreases.

Once the ping-pong ball reaches the center
of the Sun it will achieve gravity equilibrium
and lie forever suspended there (at the exact
center of a great hollow).

Does the ping pong ball have no momentum? If not, how was it
travelling in the first place?

* * *Conclusions from the above
* * * * *thought experiment:

There is either a huge cavity at the center
of the Sun, or certainly a cavernous region
therein where there isn't as much Sun-
matter as there must be surrounding it.
According to the current laws of gravity.

Does not follow. Matter has momentum, and matter interacts in ways
other than gravitationally. Therefore there is pressure to keep
matter above from moving below.

However, current theory says that the center
of the Sun (of every star) is the place where
the greatest amount of pressure exists. In
fact: It is at the center of every star that the
fusion that keeps a star "going" is taking
place--exactly because this is the region of
the highest amount of gravitational pressures!

And pressure also is seen to increase, as far down as we can see.

*These are two self-excluding viewpoints:

One of them can be correct

That the components of the Sun interact by other than gravity...

while the other one is not.

That matter in the Sun is Dark Matter-like.

But both of them cannot be correct at the
same time:

Done.

Either gravity exists AND the center of the
Sun (of every star) is hollow.

Clearly in contradiction with the available data, and without any
merit.

Or fusion DOES indeed take place at the
center of the stars because the center
of every star is its region of maximun
pressure--and therefore the effect of
gravity is "somehow" negated/voided
inside the stars. **

Which is it?

The "somehow voided" is called "pressure". Normal matter is not Dark
Mater-like.

David A. Smith