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Groups > sci.physics > #828188 > unrolled thread

Re: How galaxies make their rotation curves flat and what about dark matter?

Started byPengKuan Em <titang78@gmail.com>
First post2021-07-19 15:16 -0700
Last post2021-07-20 10:57 -0700
Articles 14 — 6 participants

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  Re: How galaxies make their rotation curves flat and what about dark matter? PengKuan Em <titang78@gmail.com> - 2021-07-19 15:16 -0700
    Re: How galaxies make their rotation curves flat and what about dark matter? "mitchr...@gmail.com" <mitchrae3323@gmail.com> - 2021-07-19 21:37 -0700
      Re: How galaxies make their rotation curves flat and what about dark matter? Paul Alsing <pnalsing@gmail.com> - 2021-07-19 21:42 -0700
        Re: How galaxies make their rotation curves flat and what about dark matter? Michael Moroney <moroney@world.std.spaamtrap.com> - 2021-07-20 02:51 -0400
          Re: How galaxies make their rotation curves flat and what about dark matter? Clutterfreak <clutterfreakincarnate@gmail.com> - 2021-07-20 11:56 -0500
            Re: How galaxies make their rotation curves flat and what about dark matter? Paul Alsing <pnalsing@gmail.com> - 2021-07-20 10:33 -0700
              Re: How galaxies make their rotation curves flat and what about dark matter? Clutterfreak <clutterfreakincarnate@gmail.com> - 2021-07-20 13:40 -0500
                Re: How galaxies make their rotation curves flat and what about dark matter? "mitchr...@gmail.com" <mitchrae3323@gmail.com> - 2021-07-20 12:08 -0700
                Re: How galaxies make their rotation curves flat and what about dark matter? Paul Alsing <pnalsing@gmail.com> - 2021-07-20 13:08 -0700
                  Re: How galaxies make their rotation curves flat and what about dark matter? "mitchr...@gmail.com" <mitchrae3323@gmail.com> - 2021-07-20 18:21 -0700
          Re: How galaxies make their rotation curves flat and what about dark matter? Paul Alsing <pnalsing@gmail.com> - 2021-07-20 10:24 -0700
            Re: How galaxies make their rotation curves flat and what about dark matter? whodat <whodaat@void.nowgre.com> - 2021-07-20 22:11 -0500
          Re: How galaxies make their rotation curves flat and what about dark matter? PengKuan Em <titang78@gmail.com> - 2021-07-22 18:42 -0700
        Re: How galaxies make their rotation curves flat and what about dark matter? "mitchr...@gmail.com" <mitchrae3323@gmail.com> - 2021-07-20 10:57 -0700

#828188 — Re: How galaxies make their rotation curves flat and what about dark matter?

FromPengKuan Em <titang78@gmail.com>
Date2021-07-19 15:16 -0700
SubjectRe: How galaxies make their rotation curves flat and what about dark matter?
Message-ID<1943a007-7f18-4944-8f43-7cb401e97e05n@googlegroups.com>
Le vendredi 16 avril 2021 à 18:58:53 UTC+2, mitchr...@gmail.com a écrit :
> On Friday, April 16, 2021 at 7:12:25 AM UTC-7, tita...@gmail.com wrote: 
> > The correct link of blogspot 
> > https://pengkuanonphysics.blogspot.com/2021/04/how-galaxies-make-their-rotation-curves.html
> Dark matter does not give a result... 
> Its gravity would act from all angles 
> leaving no net speed up to the 
> outer galactic stars. 
> 
> If galaxies grow their fast stars 
> are carried outward. 
> 
> Mitchell Raemsch
 yes. So Dark matter is not true.

pk

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#828220

From"mitchr...@gmail.com" <mitchrae3323@gmail.com>
Date2021-07-19 21:37 -0700
Message-ID<d3c9a12d-1981-4968-9010-6dbeef04347en@googlegroups.com>
In reply to#828188
On Monday, July 19, 2021 at 3:16:23 PM UTC-7, tita...@gmail.com wrote:
> Le vendredi 16 avril 2021 à 18:58:53 UTC+2, mitchr...@gmail.com a écrit : 
> > On Friday, April 16, 2021 at 7:12:25 AM UTC-7, tita...@gmail.com wrote: 
> > > The correct link of blogspot 
> > > https://pengkuanonphysics.blogspot.com/2021/04/how-galaxies-make-their-rotation-curves.html 
> > Dark matter does not give a result... 
> > Its gravity would act from all angles 
> > leaving no net speed up to the 
> > outer galactic stars. 
> > 
> > If galaxies grow their fast stars 
> > are carried outward. 
> > 
> > Mitchell Raemsch
> yes. So Dark matter is not true. 
> 
> pk

Galaxies don't rotate. Their stars orbit the gravitational center.

Mitchell Raemsch

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#828221

FromPaul Alsing <pnalsing@gmail.com>
Date2021-07-19 21:42 -0700
Message-ID<944ff008-f765-495c-b9fb-caf4cfa1388bn@googlegroups.com>
In reply to#828220
On Monday, July 19, 2021 at 9:37:33 PM UTC-7, mitchr...@gmail.com wrote:

> Galaxies don't rotate. Their stars orbit the gravitational center.

That is pretty much the same thing, Mitch...

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#828225

FromMichael Moroney <moroney@world.std.spaamtrap.com>
Date2021-07-20 02:51 -0400
Message-ID<sd5rqd$1p2r$1@gioia.aioe.org>
In reply to#828221
On 7/20/2021 12:42 AM, Paul Alsing wrote:
> On Monday, July 19, 2021 at 9:37:33 PM UTC-7, mitchr...@gmail.com wrote:
> 
>> Galaxies don't rotate. Their stars orbit the gravitational center.
> 
> That is pretty much the same thing, Mitch...
> 

Is it? Galaxies don't rotate as a unit like a record on a record player. 
They're more like a hurricane, with the center rotating more rapidly 
than outer stars.  Or even the solar system with inner planets orbiting 
much more rapidly than outer planets. Do you say the solar system rotate?

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#828251

FromClutterfreak <clutterfreakincarnate@gmail.com>
Date2021-07-20 11:56 -0500
Message-ID<sd6v8b$a9d$1@solani.org>
In reply to#828225
On 7/20/2021 1:51 AM, Michael Moroney wrote:
> On 7/20/2021 12:42 AM, Paul Alsing wrote:
>> On Monday, July 19, 2021 at 9:37:33 PM UTC-7, mitchr...@gmail.com wrote:
>>
>>> Galaxies don't rotate. Their stars orbit the gravitational center.
>>
>> That is pretty much the same thing, Mitch...
>>
> 
> Is it? Galaxies don't rotate as a unit like a record on a record player. 
> They're more like a hurricane, with the center rotating more rapidly 
> than outer stars.  Or even the solar system with inner planets orbiting 
> much more rapidly than outer planets. Do you say the solar system rotate?


What else to expect from an "engine oil" major.

-- 
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

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#828260

FromPaul Alsing <pnalsing@gmail.com>
Date2021-07-20 10:33 -0700
Message-ID<0c76a380-9cb8-47bf-a5c4-4de89beee006n@googlegroups.com>
In reply to#828251
On Tuesday, July 20, 2021 at 9:56:47 AM UTC-7, Clutterfreak wrote:

> What else to expect from an "engine oil" major. 

What else to expect from yet another McGinn sock puppet... who does not understand that over a hundred U.S. universities offer degrees in Astronomy...

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#828273

FromClutterfreak <clutterfreakincarnate@gmail.com>
Date2021-07-20 13:40 -0500
Message-ID<sd75bu$gfo$1@solani.org>
In reply to#828260
On 7/20/2021 12:33 PM, Paul Alsing wrote:
> On Tuesday, July 20, 2021 at 9:56:47 AM UTC-7, Clutterfreak wrote:
> 
>> What else to expect from an "engine oil" major.
> 
> What else to expect from yet another McGinn sock puppet... who does not understand that over a hundred U.S. universities offer degrees in Astronomy...
> 

If you want to continue to be useless and at the same time not answer to 
anything that you're asked, you're going to end up left by yourself. Is 
that what you want? I don't have time for useless people.

You can of course come here and read my posts for ever, that's why 
you're here, but don't expect I spend my time interacting with you when 
you act immaturely in response.

Do you want to join "_" and jimpanzee and the like??

-- 
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

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#828277

From"mitchr...@gmail.com" <mitchrae3323@gmail.com>
Date2021-07-20 12:08 -0700
Message-ID<ceb9b2e9-d7e5-47b6-8b7f-37d8cfc1c2a6n@googlegroups.com>
In reply to#828273
On Tuesday, July 20, 2021 at 11:41:06 AM UTC-7, Clutterfreak wrote:
> On 7/20/2021 12:33 PM, Paul Alsing wrote: 
> > On Tuesday, July 20, 2021 at 9:56:47 AM UTC-7, Clutterfreak wrote: 
> > 
> >> What else to expect from an "engine oil" major. 
> > 
> > What else to expect from yet another McGinn sock puppet... who does not understand that over a hundred U.S. universities offer degrees in Astronomy... 
> >
> If you want to continue to be useless and at the same time not answer to 
> anything that you're asked, you're going to end up left by yourself. Is 

How can stars rotate and that be orbit?
Don't they have to rotate on their own?

Mitchell Raemsch

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#828283

FromPaul Alsing <pnalsing@gmail.com>
Date2021-07-20 13:08 -0700
Message-ID<dbd56c5f-fbd5-4580-85c0-0f3e3dc6d940n@googlegroups.com>
In reply to#828273
On Tuesday, July 20, 2021 at 11:41:06 AM UTC-7, Clutterfreak wrote:
> On 7/20/2021 12:33 PM, Paul Alsing wrote: 
> > On Tuesday, July 20, 2021 at 9:56:47 AM UTC-7, Clutterfreak wrote: 
> > 
> >> What else to expect from an "engine oil" major. 
> > 
> > What else to expect from yet another McGinn sock puppet... who does not understand that over a hundred U.S. universities offer degrees in Astronomy... 
> >
> If you want to continue to be useless and at the same time not answer to 
> anything that you're asked, you're going to end up left by yourself.

That would be fine. Earlier you 'threatened' to plonk me. I dare you to do so, that would be fine, too. You don't accept any of my answers now so there is little need for me to continue, McGinn...

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#828305

From"mitchr...@gmail.com" <mitchrae3323@gmail.com>
Date2021-07-20 18:21 -0700
Message-ID<0a8b6ebf-3a34-4e68-ab70-f249f2869320n@googlegroups.com>
In reply to#828283
On Tuesday, July 20, 2021 at 1:09:02 PM UTC-7, pnal...@gmail.com wrote:
> On Tuesday, July 20, 2021 at 11:41:06 AM UTC-7, Clutterfreak wrote:
> > On 7/20/2021 12:33 PM, Paul Alsing wrote: 
> > > On Tuesday, July 20, 2021 at 9:56:47 AM UTC-7, Clutterfreak wrote: 
> > > 
> > >> What else to expect from an "engine oil" major. 
> > > 
> > > What else to expect from yet another McGinn sock puppet... who does not understand that over a hundred U.S. universities offer degrees in Astronomy... 
> > > 
> > If you want to continue to be useless and at the same time not answer to 
> > anything that you're asked, you're going to end up left by yourself.
> That would be fine. Earlier you 'threatened' to plonk me. I dare you to do so, that would be fine, too. You don't accept any of my answers now so there is little need for me to continue, McGinn...

Are you still following me paul?
Why do you need to make it look like that you moron?

Mitchell Raemsch

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#828259

FromPaul Alsing <pnalsing@gmail.com>
Date2021-07-20 10:24 -0700
Message-ID<7e25ddce-3292-4bfb-a7bd-e2736c92ab02n@googlegroups.com>
In reply to#828225
On Monday, July 19, 2021 at 11:52:02 PM UTC-7, Michael Moroney wrote:
> On 7/20/2021 12:42 AM, Paul Alsing wrote: 
> > On Monday, July 19, 2021 at 9:37:33 PM UTC-7, mitchr...@gmail.com wrote: 
> > 
> >> Galaxies don't rotate. Their stars orbit the gravitational center. 
> > 
> > That is pretty much the same thing, Mitch... 

> Is it? Galaxies don't rotate as a unit like a record on a record player. 
> They're more like a hurricane, with the center rotating more rapidly 
> than outer stars. Or even the solar system with inner planets orbiting 
> much more rapidly than outer planets. Do you say the solar system rotate?

I agree, like a hurricane, rotating more rapidly in the center... you did use the word 'rotating", Mike, didn't you? I use it exactly the same way as you use it. Regarding the solar system, I never gave that a thought. Planets and other solar system bodies rotate around their axes, of course, but are more correctly 'revolving' around the Sun. If you were to say that galaxies revolve rather than rotate, I could not argue with that claim, but the literature all seems to use the term 'rotate' for some reason. I don't know that it really makes much difference, as long we all agree as to what it means.

https://tinyurl.com/2v75bt3h

When Mitch claims that galaxies do not rotate, he is incorrect as far as the scientific community is concerned. When he says that the stars of a galaxy orbit the gravitational center, he is correct.

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#828312

Fromwhodat <whodaat@void.nowgre.com>
Date2021-07-20 22:11 -0500
Message-ID<ilphi6Fe66fU1@mid.individual.net>
In reply to#828259
On 7/20/2021 12:24 PM, Paul Alsing wrote:
> On Monday, July 19, 2021 at 11:52:02 PM UTC-7, Michael Moroney wrote:
>> On 7/20/2021 12:42 AM, Paul Alsing wrote:
>>> On Monday, July 19, 2021 at 9:37:33 PM UTC-7, mitchr...@gmail.com wrote:
>>>
>>>> Galaxies don't rotate. Their stars orbit the gravitational center.
>>>
>>> That is pretty much the same thing, Mitch...
> 
>> Is it? Galaxies don't rotate as a unit like a record on a record player.
>> They're more like a hurricane, with the center rotating more rapidly
>> than outer stars. Or even the solar system with inner planets orbiting
>> much more rapidly than outer planets. Do you say the solar system rotate?
> 
> I agree, like a hurricane, rotating more rapidly in the center... you did use the word 'rotating", Mike, didn't you? I use it exactly the same way as you use it. Regarding the solar system, I never gave that a thought. Planets and other solar system bodies rotate around their axes, of course, but are more correctly 'revolving' around the Sun. If you were to say that galaxies revolve rather than rotate, I could not argue with that claim, but the literature all seems to use the term 'rotate' for some reason. I don't know that it really makes much difference, as long we all agree as to what it means.
> 
> https://tinyurl.com/2v75bt3h
> 
> When Mitch claims that galaxies do not rotate, he is incorrect as far as the scientific community is concerned. When he says that the stars of a galaxy orbit the gravitational center, he is correct.

Apparently Mitch missed the lecture where the discussion
centered on "the whole is the sum of its parts."

Not to be confused with a systems analysis in which
the system is larger than the sum of its parts.

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#828606

FromPengKuan Em <titang78@gmail.com>
Date2021-07-22 18:42 -0700
Message-ID<55e5d11d-ba6e-449e-84a3-64a650616eccn@googlegroups.com>
In reply to#828225
Le mardi 20 juillet 2021 à 08:52:02 UTC+2, Michael Moroney a écrit :
> On 7/20/2021 12:42 AM, Paul Alsing wrote: 
> > On Monday, July 19, 2021 at 9:37:33 PM UTC-7, mitchr...@gmail.com wrote: 
> > 
> >> Galaxies don't rotate. Their stars orbit the gravitational center. 
> > 
> > That is pretty much the same thing, Mitch... 
> >
> Is it? Galaxies don't rotate as a unit like a record on a record player. 
> They're more like a hurricane, with the center rotating more rapidly 
> than outer stars. Or even the solar system with inner planets orbiting 
> much more rapidly than outer planets. Do you say the solar system rotate?

This not true. Because there is a problem of "Galaxy rotation curve" please read 
https://en.wikipedia.org/wiki/Galaxy_rotation_curve

Stars revolve around their galaxy's centre at equal or increasing speed over a large range of distances. In contrast, the orbital velocities of planets in planetary systems and moons orbiting planets decline with distance according to Kepler’s third law. 

PK 

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#828266

From"mitchr...@gmail.com" <mitchrae3323@gmail.com>
Date2021-07-20 10:57 -0700
Message-ID<cbb57d30-040b-45df-ad3e-ae3d24356dfbn@googlegroups.com>
In reply to#828221
On Monday, July 19, 2021 at 9:42:56 PM UTC-7, pnal...@gmail.com wrote:
> On Monday, July 19, 2021 at 9:37:33 PM UTC-7, mitchr...@gmail.com wrote: 
> 
> > Galaxies don't rotate. Their stars orbit the gravitational center.
> That is pretty much the same thing, Mitch...

So Earth's rotation is now its orbit you moron?

Mitchell Raemsch

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