Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics > #593013

Re: Dark matter

Show all headers | View raw

Michael J.  Strickland wrote:

> […] Thomas 'PointedEars' Lahn […] wrote:
>> Michael J.  Strickland wrote:
>>> […] Thomas 'PointedEars' Lahn […] wrote:
>>>> Michael J.  Strickland wrote:
>>>>> [?] noTthaTguY <abu.kuanysh05@gmail.com> wrote:
>>>>>>> > Radiation pressure is stronger than gravity for all
>>>>>>> > matter below a certain size (radius).
>>>>> […]
>>>>> Like I said we are not even 1 light year out yet.
>>>> And we have already found the point, through Voyager, where there is no
>>>> more solar wind.
>>> I'm not referring to the solar wind. I'm referring to the dust pushed
>>> out by the radiation pressure component of it.
>> You are contradicting yourself.  If you think that radiation pressure is 
>> a “component” of the solar wind, then you *are* referring to the solar 
>> wind when you say “radiation pressure”.
> 
> If you bother to read for information

I have; you have not.

> […] I said the radiation pressure is a component of the solar wind.

And that is wrong.

> The solar wind includes other things besides EM radiation 9 the source of
> the radiation pressure).

Not even wrong.  “EM radiation 9”?

> It is a slang term used to include all emissions from the sun.

This is a scientific newsgroup.  You just cannot redefine scientific terms 
as you see fit and be taken seriously at the same time.  The solar wind is 
*only* the stream of *charged* particles emitted by a star (here: Sol, 
trivially known as “the Sun” [with a capital “S”]).  (See below.)

>>JFYI: Radiation pressure is _not_ a component of the solar wind, and
>>radiation pressure decreases as the distance from the source increases.
> 
> FYI radiation pressure decreases NOT as the distance from the source
> but as that distance squared.

I did not intend to give an exact mathematical description, only a hint.
You know the inverse square law *now that I referred you to it*, but as you 
did with other scientific facts, you fail to appreciate the meaning of it.

If you would calculate the radiation pressure that particles experience in 
121 AU distance from Sol, you would find that it is ca. 0.00062 µPa for 
reflection and ca. 0.00031 µPa for absorption.  Do you really think that 
this pressure is sufficient to push particles with a diameter of ca. 0.5 µm 
out of a star system?

>>> Solar wind consists of particles and radiation currently emitted from
>>> the sun.
>>
>>  [You are contradicting yourself again here.]
>>
>>No, it does not.
> 
> Yes it does.

You wish.

,-<https://en.wikipedia.org/wiki/Solar_wind>
| 
| The solar wind is a stream of charged particles released from the upper 
| atmosphere of the Sun. […]


,-<http://www.space.com/22215-solar-wind.html>
| 
| The solar wind streams plasma and particles from the sun out into space. 
| […]

,-<http://www.qrg.northwestern.edu/projects/vss/docs/space-environment/3-what-is-solar-wind.html>
| 
| The solar wind is a stream of energized, charged particles, […]

,-<https://www.spaceweatherlive.com/en/help/the-solar-wind>
| 
| The solar wind is a stream of charged particles (a plasma) released from 
| the Sun. […]

,-<http://www.skyandtelescope.com/astronomy-resources/solar-wind/>
| 
| The Sun’s outer atmosphere, the super-hot corona, is the source of the 
| solar wind, a steady outflow of charged particles from the Sun. […]

,-<http://solar-center.stanford.edu/FAQ/Qsolwindcomp.html>
| 
| […]
| The composition of the solar wind is a mixture of materials found in the 
| solar plasma, composed of ionized hydrogen (electrons and protons) with an 
| 8% component of helium (alpha particles) and trace amounts of heavy ions 
| and atomic nuclei: C, N, O, Ne, Mg, Si, S, and Fe ripped apart by heating 
| of the Sun's outer atmosphere, that is, the corona (Feldman et al., 1998).
| 
| SOHO also identified traces of some elements for the first time such as P, 
| Ti, Cr and Ni and an assortment of solar wind isotopes identified for the 
| first time: Fe 54 and 56; Ni 58,60,62 (Galvin, 1996).

(etc. pp.)

By contrast, electromagnetic radiation consists of photons, which have 
*zero* electric charge.  They are _not_ charged particles, so cannot be part 
of the solar wind.

>>  [Please stop bullshitting about Wikipedia.  By contrast to your
>>   statements so far, all statements there must be sourced or they can be
>>   removed by anyone, and the statements that I referred to *were*
>>   sourced.]
> 
> Kid, you are the only one "bullshitting" in this thread and it is
> apparent to competent person who reads it. Grow up soon.

You are provably and proven incompetent in all fields that matter here, so 
you are really not in a good position to pass judgment on who’s 
“bullshitting”.

> FYI, Wikipedia entries can be added or removed by anyone whether they
> are sourced or not.

Yes, but articles that contain statements that are not sourced will be 
removed earlier than others (unless someone takes the time to augment it 
with citations), and if articles that contain statements which are sourced 
are deleted, they will quickly be restored.  And AISB, in the articles that 
I referred you to, the relevant statements were sourced.  IOW, there is 
scientific quality assurance in the Wikipedia.  So it is illogical of you
to claim that those were not appropriate references.
  
> I can see you are just trolling for argument and I'm not going to
> indulge you further. You are obviously un-educated or mis-educated and
> that is surely not my fault.

LOL
 
> Goodbye and welcome to the kill-filter.

Your loss.
 
-- 
PointedEars

Twitter: @PointedEars2
Please do not cc me. / Bitte keine Kopien per E-Mail.

Back to sci.physics | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Galactic Interface Dark Surface Alan Folmsbee <omnilobe@gmail.com> - 2016-08-09 14:12 -0700
  Re: Galactic Interface Dark Surface Michael J. Strickland <michael06582@comcast.net> - 2016-08-09 19:45 -0400
    Re: Galactic Interface Dark Surface benj <benj@nobody.net> - 2016-08-09 20:23 -0400
    Re: Galactic Interface Dark Surface Alan Folmsbee <omnilobe@gmail.com> - 2016-08-09 17:39 -0700
    Re: Galactic Interface Dark Surface Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-10 18:54 +0200
      Arp, haltoN noTthaTguY <abu.kuanysh05@gmail.com> - 2016-08-10 11:10 -0700
        Re: Arp, haltoN Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-10 20:19 +0200
        Re: Arp, haltoN Michael J. Strickland <michael06582@comcast.net> - 2016-08-10 23:27 -0400
          Re: Arp, haltoN Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-11 06:27 +0200
            Re: Re: Arp, haltoN Michael J. Strickland <michael06582@comcast.net> - 2016-08-11 06:10 -0400
              Dark matter (was: Re: Arp, haltoN) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-11 18:52 +0200
                Dark matter (was: Re: Arp, haltoN) john <johnsefton288@gmail.com> - 2016-08-11 11:59 -0700
                Re: Dark matter (was: Re: Arp, haltoN) Michael J. Strickland <michael06582@comcast.net> - 2016-08-12 06:09 -0400
                Re: Dark matter Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-13 17:27 +0200
      Re: Galactic Interface Dark Surface Mike Duffy <mqduffy001@bell.net> - 2016-08-10 21:35 -0400
        Re: Galactic Interface Dark Surface Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-11 05:48 +0200
          Re: Galactic Interface Dark Surface noTthaTguY <abu.kuanysh05@gmail.com> - 2016-08-11 13:59 -0700
            Re: Galactic Interface Dark Surface Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-12 06:46 +0200
              a.s.c.i.i noTthaTguY <abu.kuanysh05@gmail.com> - 2016-08-12 12:35 -0700

csiph-web