A new theory of how galactic spiral arms work simulated

Since the 1960's we've been told that the spiral arms of galaxies are
just an optical illusion created by density waves of stars bunching up
or spreading out as they go from the crest to the trough. The stars that
make up the arms aren't actually travelling with the arms, and don't
actually belong to those arms. The arms and the stars are independent
features, like people doing the wave in a stadium. Most school children
would normally assume that the stars are travelling with those arms, so
this was explained to correct their assumption.

But it looks like the school children were right after all. The stars
are part of the arms, and they travel with the arms. The computer
simulation couldn't get the density wave theory to work. It turns out
that the stars are stuck to the arms through their mutual gravity. Some
stars move towards the inner part of the arms, while other stars move
towards the outer edges, but they stay with the arms all throughout.

Yousuf Khan

***

New theory of evolution for spiral galaxy arms
""We have found it impossible to reproduce the traditional theory, but
stars move with the spiral pattern in our simulations at the same speed.
We simulated the evolution of spiral arms for a galaxy with five million
stars over a period of 6 billion years. We found that stars are able to
migrate much more efficiently than anyone previously thought. The stars
are trapped and move along the arm by their gravitational influence, but
we think that eventually the arm breaks up due to the shear forces,"
said Grand."
http://www.sciencedaily.com/releases...0420111343.htm

On a sunny day (Thu, 21 Apr 2011 00:46:23 -0400) it happened Yousuf Khan
wrote in
:

New theory of evolution for spiral galaxy arms
""We have found it impossible to reproduce the traditional theory, but
stars move with the spiral pattern in our simulations at the same speed.
We simulated the evolution of spiral arms for a galaxy with five million
stars over a period of 6 billion years. We found that stars are able to
migrate much more efficiently than anyone previously thought. The stars
are trapped and move along the arm by their gravitational influence, but
we think that eventually the arm breaks up due to the shear forces,"
said Grand."
http://www.sciencedaily.com/releases...0420111343.htm


It is probably even simpler:
The centre spits out the matter that those stars form in like a garden sprinkler.
In my view some processes at the centre, where now a 'black hole' is assumed,
create particles that spray outwards.
In a Le Sage theory 'black hole' is something not with an extreme mass,
but rather a place where all particles are stopped,
so LESS pressure - and no singularity - if you go deeper into that object.
That could be the case, and I suspect processes happening in those galaxy cores
that create Le Sage like particles, and cause the anomaly now put into mathematical form
by formulas like MOND (I deliberately do not call MOND a 'theory', just curve fitting :-) ).

On Apr 20, 10:46*pm, Yousuf Khan wrote:
Since the 1960's we've been told that the spiral arms of galaxies are
just an optical illusion created by density waves of stars bunching up
or spreading out as they go from the crest to the trough. The stars that
make up the arms aren't actually travelling with the arms, and don't
actually belong to those arms. The arms and the stars are independent
features, like people doing the wave in a stadium. Most school children
would normally assume that the stars are travelling with those arms, so
this was explained to correct their assumption.

But it looks like the school children were right after all. The stars
are part of the arms, and they travel with the arms. The computer
simulation couldn't get the density wave theory to work. It turns out
that the stars are stuck to the arms through their mutual gravity. Some
stars move towards the inner part of the arms, while other stars move
towards the outer edges, but they stay with the arms all throughout.

* * * * Yousuf Khan

* * * * ***

New theory of evolution for spiral galaxy arms
""We have found it impossible to reproduce the traditional theory, but
stars move with the spiral pattern in our simulations at the same speed.
We simulated the evolution of spiral arms for a galaxy with five million
stars over a period of 6 billion years. We found that stars are able to
migrate much more efficiently than anyone previously thought. The stars
are trapped and move along the arm by their gravitational influence, but
we think that eventually the arm breaks up due to the shear forces,"
said Grand."http://www.sciencedaily.com/releases/2011/04/110420111343.htm

The arms break up about as frequently as
electrons break up.

Galaxies and atoms are the same thing.

john
galaxy model for the atom

On 4/21/2011 8:45 AM, john wrote:
The arms break up about as frequently as
electrons break up.

Galaxies and atoms are the same thing.

Since when do electrons break up?

Yousuf Khan

On Apr 21, 8:43*am, Yousuf Khan wrote:
On 4/21/2011 8:45 AM, john wrote:

The arms break up about as frequently as
electrons break up.

Galaxies and atoms are the same thing.

Since when do electrons break up?

* * * * Yousuf Khan

They don't.
And neither do galactic arms.
john

On 11-04-21 11:17 AM, john wrote:
On Apr 21, 8:43 am, Yousuf wrote:
On 4/21/2011 8:45 AM, john wrote:
The arms break up about as frequently as
electrons break up.

Since when do electrons break up?

They don't.
And neither do galactic arms.
john

Well, actually according to simulation, the galactic arms break up ever
80-100 million years, to be immediately replaced by new ones.

Yousuf Khan

On 4/21/11 7:45 AM, john wrote:


The arms break up about as frequently as
electrons break up.


Too bad you have never done any self-education about
density waves and spiral arms, John. You might want
to start he http://casa.colorado.edu/~danforth/science/spiral/

On Apr 24, 7:19*pm, Sam Wormley wrote:
On 4/21/11 7:45 AM, john wrote:



The arms break up about as frequently as
electrons break up.

* *Too bad you have never done any self-education about
* *density waves and spiral arms, John. You might want
* *to start hehttp://casa.colorado.edu/~danforth/science/spiral/

"Density waves" is B.S.
They just showed that. You might want to read what they said.

Density waves, like Dark Matter, is knee-jerk
"fantasy physics" trying to get around the blatant
observation that motion of galactic arms proves our
"suck gravity" to be WRONG. Black Holes were already a
plain-as-the-nose-on-your-face indication of that obvious fact.

Too bad you have never done any actual thinking, Sam.
Analyze what you read- don't just believe it.

Think about suck gravity for a minute (maybe it will
take you longer- probably it will); how does ANY
influence (I won't call it a force so you don't jump on that)
how does ANY influence travel in the OPPOSITE
DIRECTION that it acts?

Does a tsunami move TOWARDS the epicenter?
Which slows you down. a headwind or a tailwind?
If you fall asleep in the sun, is it the side facing
the sun that gets burned or the side away?

How does something self-gravitate? Does it
put out a radiation that
travels in a circle?

How many does it take to Tango, Sam?

Density waves? That's an apt description of
the thinking in Physics, maybe. I can't believe how
dense most of these 'thinkers' seem to be.

Yikes!! Am I in some kind of weird dream where no-one can
use even the most elementary logic? Wake up, guys!!

john

On Apr 21, 1:33*am, Jan Panteltje wrote:
On a sunny day (Thu, 21 Apr 2011 00:46:23 -0400) it happened Yousuf Khan
wrote in
:

New theory of evolution for spiral galaxy arms
""We have found it impossible to reproduce the traditional theory, but
stars move with the spiral pattern in our simulations at the same speed.
We simulated the evolution of spiral arms for a galaxy with five million
stars over a period of 6 billion years. We found that stars are able to
migrate much more efficiently than anyone previously thought. The stars
are trapped and move along the arm by their gravitational influence, but
we think that eventually the arm breaks up due to the shear forces,"
said Grand."
http://www.sciencedaily.com/releases...0420111343.htm

It is probably even simpler:
The centre spits out the matter that those stars form in like a garden sprinkler.
In my view some processes at the centre, where now a 'black hole' is assumed,
create particles that spray outwards.
In a Le Sage theory 'black hole' is something not with an extreme mass,
but rather a place where all particles are stopped,
so LESS pressure - and no singularity - if you go deeper into that object..
That could be the case, and I suspect processes happening in those galaxy cores
that create Le Sage like particles, and cause the anomaly now put into mathematical form
by formulas like MOND (I deliberately do not call MOND a 'theory', just curve fitting :-) ).

A black hole could simply be an empty sphere of antimatter, made of a
great many positrons.

http://translate.google.com/#
Brad Guth, Brad_Guth, Brad.Guth, BradGuth, BG / “Guth Usenet”

On 24/04/2011 9:19 PM, Sam Wormley wrote:
On 4/21/11 7:45 AM, john wrote:


The arms break up about as frequently as
electrons break up.


Too bad you have never done any self-education about
density waves and spiral arms, John. You might want
to start he http://casa.colorado.edu/~danforth/science/spiral/


Actually, Sam, this study is debunking the density wave theory.

Yousuf Khan