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Re: Jupiter's Great Red Spot

Followups directed to: sci.astro

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Gary Harnagel wrote:

> On Tuesday, July 4, 2017 at 5:24:07 PM UTC-6, Thomas 'PointedEars' Lahn
> wrote:

See below.

>> Gary Harnagel wrote:
>> > On Tuesday, July 4, 2017 at 10:08:37 AM UTC-6, Thomas 'PointedEars'
>> > Lahn wrote:
>> 
>> Attribution _line_, not attribution novel.
> 
> I didn't write it:  the google editor did it.  Don't get your panties in a
> bunch.

*You* posted it.  *You* could have shortened it before if *you* wanted to.  
Do not blame others for *your* failure.

That also includes your mindless full-quoting.  It may be acceptable in 
Google Groups groups, but not in Usenet where you are posting to.
 
>> > > Dorothy J Heydt [wrote]:
>> > > > […] there used to be a saying among classic (I mean Greco-Roman
>> > > > [times),
>> > > > that three astronomical objects shone red: Sirius, Mars, and
>> > > > Jupiter
>> > > > (but not as red)  Sirius is certainly not red today, and current
>> > > > astrophysics has no explanation for a star turning from bright red
>> > > > to bright blue-white.  […]
>> > > Yes, it has.  For example, there is the Asymptotic Giant Branch (AGB)
>> > > where a *red* giant becomes a *white* dwarf
>> > But it's supposed to take about 100000 years to go from red giant to
>> > white dwarf, not 2000 years.
>> From where did you get this figure?
> 
> Burnham's Celestial Handbook, Vol. 1, p. 393.

That was published in 1978; it is almost 40 years out of date now.
(I won’t even bother checking the page to see if you misunderstood it.)
 
>> We do not know where Sirius (which is actually a binary star system) came
>> from, and what the mass of the original star was.
> 
> I assume you're referring to Sirius B.

Yes.

> We DO know that Sirius B is a very hot white dwarf,

Yes, so what?

> therefore relatively "recent"

That is nonsense; it takes *billions of years* for a white dwarf to cool.
But if it would make sense, it would only *support* my argument.
  
>> > > (a blue tinge can also be caused by Terra’s atmosphere).
>> > And red, too, as anyone who looks at Sirius will note.
>> Maybe to some people in some locations when it rises or sets.  I have
>> never observed Sirius to appear red[dish] from Central Europe, not even
>> when it was rising.
> 
> Not just red, but flashing red and blue due to atmospheric turbulence.

That too.
 
>> It matters how long the path through the atmosphere is, and what the
>> atmospheric conditions are (e.g. air pollution), as Rayleigh scattering
>> by air molecules and particles scatters light of shorter wavelengths
>> (e.g. blueish light) more than that of greater wavelengths (i.e. reddish
>> light). Thus, the longer the atmospheric path, the more reddish does the
>> light appear (see also: sunrise/sunset, lunar eclipse, and blood/harvest
>> moon).
> 
> Those effects aren't what I was referring to.

However, atmospheric turbulence has a greater effect if the light path is 
longer.  That is why the theory emphasizes the rising of the star (system).
 
>> This is actually given as one of the more likely explanations for the
>> color discrepancy: ancient astronomers whose reports this “saying” was
>> based on looked at Sirius at a different angle.
>> 
>> See also: <https://en.wikipedia.org/wiki/Sirius#Colour_controversy>
>> […]
> Sirius appears high in the sky at Mediterranean latitudes,

Nonsense.  Sirius rises and sets there like almost everywhere else on this 
planet.  (One does not need to be an astronomer to know that.)

> so that's baloney.

As my reference shows (if only you had read it), it is a theory that was 
posited by an eminent astronomer and physicist, published in a peer-reviewed 
journal of astronomy.  You are evidently neither, so I suggest you shut up 
until you have *learned* what you are talking about.

>> F’up2 sci.astro *again* (this has *nothing* to do with relativity, little
>> with physics)

Which part of that did you not get?  F’up2 set again.
 
> What about the possibility of another companion star close to Sirius A?
> This was also mentioned in the Wiki article.  It could steal matter and
> flare up.

I am not going to entertain your speculations as long as you keep ignoring 
what is on-topic in the newsgroup that you are posting to.  (Again this has 
nothing to do with Google Groups – which is technically flawed indeed –, it 
is *your* failure.)

-- 
PointedEars

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

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Thread

Jupiter's Great Red Spot  The Starmaker <starmaker@ix.netcom.com> - 2017-07-03 10:45 -0700
  Re: Jupiter's Great Red Spot Whisper <beaver999@ozemail.com> - 2017-07-04 21:22 +1000
    Re: Jupiter's Great Red Spot Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-04 15:03 +0200
    Re: Jupiter's Great Red Spot djheydt@kithrup.com (Dorothy J Heydt) - 2017-07-04 14:25 +0000
      Re: Jupiter's Great Red Spot Gary Harnagel <hitlong@yahoo.com> - 2017-07-04 09:03 -0700
        Re: Jupiter's Great Red Spot Upech Bezradne <adeeia@bbzzeop.ic> - 2017-07-07 10:45 +0000
          Re: Jupiter's Great Red Spot Tom Roberts <tjroberts137@sbcglobal.net> - 2017-07-07 09:20 -0500
            Re: Jupiter's Great Red Spot Ursler Zilberschlag <ursler@zilbersch.org> - 2017-07-09 09:39 +0000
      Re: Jupiter's Great Red Spot Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-04 18:08 +0200
        Re: Jupiter's Great Red Spot Gary Harnagel <hitlong@yahoo.com> - 2017-07-04 11:05 -0700
          Re: Jupiter's Great Red Spot Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-05 01:24 +0200
            Re: Jupiter's Great Red Spot Gary Harnagel <hitlong@yahoo.com> - 2017-07-04 18:46 -0700
              Re: Jupiter's Great Red Spot Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-05 04:48 +0200
                Re: Jupiter's Great Red Spot Gary Harnagel <hitlong@yahoo.com> - 2017-07-04 20:44 -0700
      Re: Jupiter's Great Red Spot Greg Goss <gossg@gossg.org> - 2017-07-11 07:08 -0600
        Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-13 08:50 -0700
          Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-15 11:19 -0700
            Re: Jupiter's Great Red Spot Garfield Dieter <igdle@rdlge.rf> - 2017-07-15 18:23 +0000
              Re: Jupiter's Great Red Spot Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-07-17 22:53 +0200
            Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-15 12:35 -0700
              Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-15 12:49 -0700
                Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-15 14:23 -0700
                Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-15 14:35 -0700
                Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-16 13:03 -0700
                Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-16 17:11 -0700
                Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-19 10:12 -0700
                Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-19 10:18 -0700
        Re: Jupiter's Great Red Spot David DeLaney <daviddelaney@earthlink.net> - 2017-07-18 03:40 -0500
          Re: Jupiter's Great Red Spot djheydt@kithrup.com (Dorothy J Heydt) - 2017-07-18 14:07 +0000
            Re: Jupiter's Great Red Spot Robert Woodward <robertaw@drizzle.com> - 2017-07-18 09:02 -0700
            Re: Jupiter's Great Red Spot David DeLaney <daviddelaney@earthlink.net> - 2017-07-18 14:13 -0500
    Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-04 12:13 -0700
      Re: Jupiter's Great Red Spot Whisper <beaver999@ozemail.com> - 2017-07-05 19:29 +1000
        Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-05 11:39 -0700
          Re: Jupiter's Great Red Spot The Starmaker <starmaker@ix.netcom.com> - 2017-07-08 12:22 -0700
  Re: Jupiter's Great Red Spot  Hägar <hsahm@yahoo.com> - 2017-07-04 08:31 -0700

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