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Mirror mirror tell me who is the best! NGST
21 years 10 months ago #4365
by Jim
Replied by Jim on topic Reply from
Plasma is not my favorite subject-what's the point I'm supposed to get from reading this prososal at LANL. They no doubt are looking to impress funders what are you up to?
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21 years 10 months ago #4001
by AgoraBasta
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<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>The picture is all that counts...<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>Sure! Especially to those who never read the accompanying texts and maths...
<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>Our Happy New year's day + 13 days slippage = Your Happy New Year's day<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>That's true only for the Russian Orthodox Church and a decreasing number of other churches. But the church doesn't care much of the New Year.
So you are wrong again. And how's that come that I'm not surprised...?
Happy New Year to all! <img src=icon_smile_big.gif border=0 align=middle>
<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>Our Happy New year's day + 13 days slippage = Your Happy New Year's day<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>That's true only for the Russian Orthodox Church and a decreasing number of other churches. But the church doesn't care much of the New Year.
So you are wrong again. And how's that come that I'm not surprised...?
Happy New Year to all! <img src=icon_smile_big.gif border=0 align=middle>
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21 years 10 months ago #4004
by jacques
Replied by jacques on topic Reply from
I followed those links to the plasma universe model and found them very interesting. It explain well the structure of the observable universe, but it lack the explanation of the origin of the universe or things like the redshift...
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21 years 9 months ago #4006
by AgoraBasta
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<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>...it lack the explanation of the origin of the universe or things like the redshift...<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>If the Universe is truly eternal, it must not have an origin, or it's the origin of itself.
As to the redshift, its origin can be easily explained by a gravitational mechanism as follows -
Consider the photons emitted by a star during a short time interval. Obviously, the mass of the star is reduced by:
<b>hf<sup>0</sup>/c^2</b> per photon emitted.
The "front" of photons propagates away from the star, so all the masses that the front leaves behind should feel that the mass of the star approriately reduces. Gravitational potential for the area inside the front changes by:
<b>Ghf<sup>0</sup>/rc^2</b>.
Assuming uniformity of matter distribution and front's sphericity, we can integrate
<b>4G rho pi r^2(hf<sup>0</sup>/rc^2) dr</b>
to get the total change of gravitational potential energy for the masses inside the front as:
<b>2pi(hf<sup>0</sup>/c^2)G rho r^2</b>,
which we must equate to the energy loss of the photon:
<b>h(f<sup>0</sup>-f<sup>1</sup>)</b>.
Thus, for the redshift we get:
<b>z = 2 pi rho G r^2/c^2</b>.
(rho - density, pi - "pi", f<sup>0</sup> - initial photon frequency, f<sup>1</sup> - downshifted frequency).
For the matter density of about 1 proton per cubic metre, we get z = 1 at r about 10^26 metres.
Those are rather realistic figures.
As to the redshift, its origin can be easily explained by a gravitational mechanism as follows -
Consider the photons emitted by a star during a short time interval. Obviously, the mass of the star is reduced by:
<b>hf<sup>0</sup>/c^2</b> per photon emitted.
The "front" of photons propagates away from the star, so all the masses that the front leaves behind should feel that the mass of the star approriately reduces. Gravitational potential for the area inside the front changes by:
<b>Ghf<sup>0</sup>/rc^2</b>.
Assuming uniformity of matter distribution and front's sphericity, we can integrate
<b>4G rho pi r^2(hf<sup>0</sup>/rc^2) dr</b>
to get the total change of gravitational potential energy for the masses inside the front as:
<b>2pi(hf<sup>0</sup>/c^2)G rho r^2</b>,
which we must equate to the energy loss of the photon:
<b>h(f<sup>0</sup>-f<sup>1</sup>)</b>.
Thus, for the redshift we get:
<b>z = 2 pi rho G r^2/c^2</b>.
(rho - density, pi - "pi", f<sup>0</sup> - initial photon frequency, f<sup>1</sup> - downshifted frequency).
For the matter density of about 1 proton per cubic metre, we get z = 1 at r about 10^26 metres.
Those are rather realistic figures.
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21 years 9 months ago #4282
by Jeremy
Replied by Jeremy on topic Reply from
Agora,
I watch the plasma theory with interest but I am not sure that it explains galaxy structure. The simulations you posted are cross-sections of a three dimensional plasma filament structure that must extend lengthwise out of the picture. When we look at spiral galaxies we do not see an extensive structure but a fairly pancake one. The galaxies could just as well have formed from dense matter "seeds" that spewed out material to form the galactic arms like a lawn sprinkler. I do not know that is the case but it seems there is more than one road to Mecca.
I watch the plasma theory with interest but I am not sure that it explains galaxy structure. The simulations you posted are cross-sections of a three dimensional plasma filament structure that must extend lengthwise out of the picture. When we look at spiral galaxies we do not see an extensive structure but a fairly pancake one. The galaxies could just as well have formed from dense matter "seeds" that spewed out material to form the galactic arms like a lawn sprinkler. I do not know that is the case but it seems there is more than one road to Mecca.
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21 years 9 months ago #4009
by AgoraBasta
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<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>I watch the plasma theory with interest but I am not sure that it explains galaxy structure.<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>I think it explains the galaxies perfectly. You start up with a standard gravitational mechanism, then instead of inventing dark matter you add just as much electrodynamic cohesion as is necessary to explain the rotation curves...
Furthermore, this page - public.lanl.gov/alp/plasma/mag_fields.html - clearly mentions numerical simulations done for real galaxies. Check this picture and caption:
<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote><img src=" public.lanl.gov/alp/plasma/graphics.simulations/cicumBgal2.jpg " border=0>
<b>Magnetic field derived from galaxy simulation overlaid on the galaxy NGC 4151. The blue 'ribbons' are components of a vertical magnetic field while the green arrows depict both the axisymmetric and bisymmetric magnetic fields observed in galaxies of this morphological type.</b><hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
Could you please formulate your specific doubts?
Furthermore, this page - public.lanl.gov/alp/plasma/mag_fields.html - clearly mentions numerical simulations done for real galaxies. Check this picture and caption:
<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote><img src=" public.lanl.gov/alp/plasma/graphics.simulations/cicumBgal2.jpg " border=0>
<b>Magnetic field derived from galaxy simulation overlaid on the galaxy NGC 4151. The blue 'ribbons' are components of a vertical magnetic field while the green arrows depict both the axisymmetric and bisymmetric magnetic fields observed in galaxies of this morphological type.</b><hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
Could you please formulate your specific doubts?
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