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Old 12th March 2018, 07:59 AM   #1681
ferd burfle
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Originally Posted by Sol88 View Post
Ahh me ‘ol mate Freddy b is back with another pearler!

Deep Impact: The first second

Mmmmm.....rock? Sand? Maybe even ice or carbon. Could also be hydrated silicate.....

Attaboy, Sol, keep on ignoring the density and porosity data. Maybe you fool the EC fanboys by pretending the mineral dust spectra in the literature implies rock, but you must know you’re not fooling anyone with knowledge of basic science.
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Old 12th March 2018, 05:46 PM   #1683
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Methinks this thread is now nothing more than a perfect illustration of how an idiotic, unscientific belief can become fixated in certain people's minds. There is zero evidence, nor even a scientifically viable hypothesis, to explain this woo. Yet some people want to hang onto it. Well, that is likely down to a severe lack of a decent education. Eh? Might one suggest a lack of IQ points? Most likely, in my view. Homeopathy, anyone? Astrology? All nonsense, but they all have their adherents. Thick as they might be.
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Old 13th March 2018, 04:30 AM   #1684
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Originally Posted by ferd burfle View Post
Attaboy, Sol, keep on ignoring the density and porosity data. Maybe you fool the EC fanboys by pretending the mineral dust spectra in the literature implies rock, but you must know you’re not fooling anyone with knowledge of basic science.
Ignore or question, there’s a difference, Freddy B
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Last edited by Sol88; 13th March 2018 at 04:32 AM.
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Old 13th March 2018, 04:31 AM   #1685
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Originally Posted by tusenfem View Post
That is an Rosetta RPC insiders' joke, which you will not understand.

ETA: and that was not a link to my poster (whatever that might be), but to a tweet about my talk in Umeå
So why the title?

Interested to know.
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Old 13th March 2018, 04:44 AM   #1686
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Quote:
Photometry of coma dust grains show agreement with surface values, although some differences in composition from the surface could potentially indicate the presence of hydrated minerals [67].
67. Cremonese, G. et al., 2016, Photometry of dust grains of comet 67P and connection with nucleus regions, A&A, 588, A59 doi:10.1051/0004-6361/201527307

Maybe ice maybe hydrated minerals...who knows, ay!
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Old 13th March 2018, 05:33 AM   #1687
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Originally Posted by Sol88 View Post
67. Cremonese, G. et al., 2016, Photometry of dust grains of comet 67P and connection with nucleus regions, A&A, 588, A59 doi:10.1051/0004-6361/201527307

Maybe ice maybe hydrated minerals...who knows, ay!
Wrong. Absolutely no chance of confusing the two. OSIRIS is a visible wavelength camera(s). The ice detections at Tempel 1 and Hartley 2 are in IR. Ice has some very specific absorption lines. They are well known. It is easy for IR to distinguish between ice and dust. As is explained in J. Sunshine's paper. If you'd bothered to read and understand it.
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Old 13th March 2018, 06:14 AM   #1688
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Originally Posted by Sol88 View Post
So why the title?

Interested to know.
the "philosophy" part was an insider's joke
the title is the title
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Old 13th March 2018, 11:30 AM   #1689
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Originally Posted by Sol88 View Post
Ignore or question, there’s a difference, Freddy B

Who cares, Sol? After repeated corrections you still can’t even get my nick right, let alone science.
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Last edited by ferd burfle; 13th March 2018 at 11:31 AM. Reason: Typo
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Old 13th March 2018, 01:45 PM   #1690
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Thumbs down A lie that Cremonese, G. et al is "maybe hydrated minerals" as in his delusions

Originally Posted by Sol88 View Post
67. Cremonese, G. et al., 2016, Photometry of dust grains of comet 67P and connection with nucleus regions, A&A, 588, A59 doi:10.1051/0004-6361/201527307
14 March 2018: A lie that Cremonese, G. et al is "maybe hydrated minerals" as in his comet delusions (i.e. rock).

Photometry of dust grains of comet 67P and connection with nucleus region
Quote:
Aims. Multiple pairs of high-resolution images of the dust coma of comet 67P/Churyumov-Gerasimenko have been collected by OSIRIS onboard Rosetta allowing extraction and analysis of dust grain tracks.

Methods. We developed a quasi automatic method to recognize and to extract dust tracks in the Osiris images providing size, FWHM and photometric data. The dust tracks characterized by a low signal-to-noise ratio were checked manually. We performed the photometric analysis of 70 dust grain tracks observed on two different Narrow Angle Camera images in the two filters F24 and F28, centered at λ = 480.7 nm and at λ = 743.7 nm, respectively, deriving the color and the reddening of each one. We then extracted several images of the nucleus observed with the same filters and with the same phase angle to be compared with the dust grain reddening.

Results. Most of the dust grain reddening is very similar to the nucleus values, confirming they come from the surface or subsurface layer. The histogram of the dust grain reddening has a secondary peak at negative values and shows some grains with values higher than the nucleus, suggesting a different composition from the surface grains. One hypothesis comes from the negative values point at the presence of hydrated minerals in the comet.
(my emphasis added)
The paper suggests that surface grains may consist of hydrated minerals.
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Old 13th March 2018, 02:35 PM   #1691
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Originally Posted by tusenfem View Post
the "philosophy" part was an insider's joke
the title is the title

Well if M.Volwerk, M.Taylor, Jean-Pierre Bibring and others call it rock, ok if I do from now on?

Ok by you Tusenfem?
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Old 13th March 2018, 02:44 PM   #1692
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Originally Posted by ferd burfle View Post
Who cares, Sol? After repeated corrections you still can’t even get my nick right, let alone science.
Apologies Fred burfle, unfortunately I will never stop questioning how.
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Old 13th March 2018, 03:15 PM   #1693
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Originally Posted by jonesdave116 View Post
Wrong. Absolutely no chance of confusing the two. OSIRIS is a visible wavelength camera(s). The ice detections at Tempel 1 and Hartley 2 are in IR. Ice has some very specific absorption lines. They are well known. It is easy for IR to distinguish between ice and dust. As is explained in J. Sunshine's paper. If you'd bothered to read and understand it.
What did J Sunshine say on hydrated minerals on the surface of a comet?

Investigation of the states of water and OH groups on the surface of silica
Liu Peng∗, Wang Qisui, Li Xi, Zhang Chaocan


NEAR INFRARED CHARACTERIZATION OF WATER AND HYDROXYL GROUPS ON SILICA SURFACES J. H. ANDERSON, JR. and K. A. WICKERSHEIM*

WATER ABSORPTION SPECTRUM

Sunshine’s paper is too simplistic but I guess that was done on purpose for its target audience.
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Old 13th March 2018, 03:24 PM   #1694
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Originally Posted by jonesdave116 View Post
Wrong. Absolutely no chance of confusing the two. OSIRIS is a visible wavelength camera(s). The ice detections at Tempel 1 and Hartley 2 are in IR. Ice has some very specific absorption lines. They are well known. It is easy for IR to distinguish between ice and dust. As is explained in J. Sunshine's paper. If you'd bothered to read and understand it.
But “ice” is blue, no?
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Old 13th March 2018, 04:39 PM   #1695
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Thumbs down The insanity that he can call ices and dust comets rock

Originally Posted by Sol88 View Post
Well if M.Volwerk, M.Taylor, Jean-Pierre Bibring and others call it rock, ok if I do from now on?
14 March 2018: The insanity that he can call ices and dust comets rock when his delusions include that comets are actual rock..

14 March 2018: A "M.Volwerk, M.Taylor, Jean-Pierre Bibring and others call it rock" lie.
That was an joking image in a tweet from one person (tusenfem).

People know that comets are made of ices and dust because we have measured the ices and dust. We do not have everyday terms for the structures that ices and dust in extremely low gravity in space from. Thus terrestrial terms often pop up in the scientific literature - boulders , bedrock, dunes, etc..

The insanity that this is actual terrestrial material (rock, etc.) is obvious given that tusenfem, etc. are not stupid or deluded enough to think that comets are rock.

His comet delusions include comets are rocks; these rocks were blasted from the Earth including recently; blasting was by electrical discharges between Earth and Venus; an imaginary solar electric field charges up comets; the charge causes never detected electrical discharges; comet jets are electrical discharges; images show that comets are rocks; Birkeland currents in comets and their tails with no appropriate magnetic field; papers using bedrock to describe layers of ices support his comet are rock delusion, imaginary double layers do magic; many years of lying that ices have not been detected on comets, a "hard shell of refractory material on the outside" lie, insanity of consolidated ices and dust in papers being rock.
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Old 13th March 2018, 04:41 PM   #1696
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Thumbs down 2 more lies to derail from his many comet delusions

Originally Posted by Sol88 View Post
What did J Sunshine say on hydrated minerals on the surface of a comet?
Followed by
14 March 2018: 2 more lies, stupidity and an insult to derail from his many comet delusions.
The papers are not about comets.

Yes: Water has an WATER ABSORPTION SPECTRUM !

The stupidity that people writing about ices on comets should write about irrelevant to their subject topics !

The insult that astromomers studying comets (the target audience of any paper on comets) need his delusion of "simple" explanations !

His comet delusions include comets are rocks; these rocks were blasted from the Earth including recently; blasting was by electrical discharges between Earth and Venus; an imaginary solar electric field charges up comets; the charge causes never detected electrical discharges; comet jets are electrical discharges; images show that comets are rocks; Birkeland currents in comets and their tails with no appropriate magnetic field; papers using bedrock to describe layers of ices support his comet are rock delusion, imaginary double layers do magic; many years of lying that ices have not been detected on comets, a "hard shell of refractory material on the outside" lie, insanity of consolidated ices and dust in papers being rock.

Last edited by Reality Check; 13th March 2018 at 04:45 PM.
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Old 13th March 2018, 05:41 PM   #1697
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Originally Posted by Reality Check View Post
14 March 2018: The insanity that he can call ices and dust comets rock when his delusions include that comets are actual rock..

14 March 2018: A "M.Volwerk, M.Taylor, Jean-Pierre Bibring and others call it rock" lie.
That was an joking image in a tweet from one person (tusenfem).

People know that comets are made of ices and dust because we have measured the ices and dust. We do not have everyday terms for the structures that ices and dust in extremely low gravity in space from. Thus terrestrial terms often pop up in the scientific literature - boulders , bedrock, dunes, etc..

The insanity that this is actual terrestrial material (rock, etc.) is obvious given that tusenfem, etc. are not stupid or deluded enough to think that comets are rock.

His comet delusions include comets are rocks; these rocks were blasted from the Earth including recently; blasting was by electrical discharges between Earth and Venus; an imaginary solar electric field charges up comets; the charge causes never detected electrical discharges; comet jets are electrical discharges; images show that comets are rocks; Birkeland currents in comets and their tails with no appropriate magnetic field; papers using bedrock to describe layers of ices support his comet are rock delusion, imaginary double layers do magic; many years of lying that ices have not been detected on comets, a "hard shell of refractory material on the outside" lie, insanity of consolidated ices and dust in papers being rock.
So I can call it ROCK then RC?

Looks like ROCK, hard like ROCK, and ROCK like minerals. Understood you believe not to be ROCK and have no words to call the ROCK that is comet ROCK.


but

you do call it ‘organic(e)s’, Jean-Pierre Bibring proposes a new word naming this stuff.

Quote:
With 67P’s dust-to-water ratio of 6 (and
possibly larger), it is now necessary to spend much more time in
modelling the non-volatile matrices with a modest content of ices
inside.
Marco Fulle

Quote:
Conclusions. In the framework of the presented model, which can be considered common in terms of assumptions and physical
parameters in the cometary community, the dust removal by a gas drag force is not a plausible physical mechanism. The sublimation
of not only water ice, but also of super-volatile ice (i.e., CO) is unable to remove dust grains for illumination conditions corresponding
to 1.3 AU. A way out of this impasse requires revision of the most common model assumption employed by the cometary community.
Quote:
The classical model of comets as dirty ice balls (Whipple 1950) has focused most models of comets on ices. The more we visit comets, the dustier they appear.
Unexpected and significant findings in comet 67P/Churyumov–Gerasimenko: an interdisciplinary view

Quote:
The surface of 67P/C-G is generally broken into rough and smooth terrains (e.g. Auger et al. 2015; La Forgia et al. 2015; Giacomini et al. 2016; Pajola et al. 2016b). The rough terrain is predominantly exposed bedrock, while the smooth terrain represents disaggregated, transported remnants of formerly consolidated bedrock (Sierks et al. 2015). The main control responsible for the breakdown of the solid bedrock are large gradients in solar insolation both as the nucleus orbits the Sun, and as the nucleus rotates over 12.5 h cycles (Keller et al. 2015; Pajola et al. 2017).
Geomorphology of comet 67P/Churyumov–Gerasimenko

Quote:
The mechanical properties of the surface in a number of different regions were constrained by comparing gravitational slopes and surface morphology [47 ] , where low slope (0 - 20°) terrains contained mainly fine material and few large isolated boulders (> 10 m) , intermediate slope terrai ns (20 ° -45°) associated with fallen consolidated material, debris fields with numerous intermediate size boulders (< 1m – 10m) and high -slope terrain (45 -90°) being cliff regions with exposed cons ol idated material with no boulders or fine material. Here consolidated is used to refer to areas that appear rocky in appearance and are cohesi ve enough to dis play lineaments and fractures . Overhang compressive strength ranged from 3-15 Pa (upper limit 150 Pa), a 4-30 Pa
The Rosetta mission orbiter Science overview – the
comet phase



So what are we going to call this non rocky, rocky looking stuff that is a comet?
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Old 13th March 2018, 06:29 PM   #1698
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Originally Posted by tusenfem View Post
the "philosophy" part was an insider's joke
the title is the title

I follow the RPC tweets and I've a fair idea on the "joke"

What was the talk at Umeå on?
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Old 13th March 2018, 06:48 PM   #1699
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Originally Posted by ferd burfle View Post
Who cares, Sol? After repeated corrections you still can’t even get my nick right, let alone science.
Quote:
These hypotheses could be confirmed by the recent activity observed in the Imhotep region (Groussin et al. 2015) that shows new small features having a higher albedo that is most likely due to exposed water ice OR maybe to hydrated minerals that were buried below a dust deposit. In similar events we may have the release of tiny water ice particles
Photometry of dust grains of comet 67P and connection with nucleus regions

Could be anything, ay Fred Burfle!

Assumed to be ice 'cause that's what comets are, dirtysnowballs!

most defiantly not ROCK!!
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Old 13th March 2018, 06:56 PM   #1700
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Here it comes!
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Old 13th March 2018, 07:51 PM   #1702
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Thumbs down Usual lies about papers to detail from his comet delusions

Originally Posted by Sol88 View Post
...
Unexpected and significant findings in comet 67P/Churyumov–Gerasimenko: an interdisciplinary view

Geomorphology of comet 67P/Churyumov–Gerasimenko

The Rosetta mission orbiter Science overview – the
comet phase
14 March 2018: Usual lies about papers to detail from his comet delusions.
None of these are about comets made of his delusion of rock.

His comet delusions include comets are rocks; these rocks were blasted from the Earth including recently; blasting was by electrical discharges between Earth and Venus; an imaginary solar electric field charges up comets; the charge causes never detected electrical discharges; comet jets are electrical discharges; images show that comets are rocks; Birkeland currents in comets and their tails with no appropriate magnetic field; papers using bedrock to describe layers of ices support his comet are rock delusion, imaginary double layers do magic; many years of lying that ices have not been detected on comets, a "hard shell of refractory material on the outside" lie, insanity of consolidated ices and dust in papers being rock.
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Old 14th March 2018, 12:39 AM   #1703
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Originally Posted by Sol88 View Post
Well if M.Volwerk, M.Taylor, Jean-Pierre Bibring and others call it rock, ok if I do from now on?

Ok by you Tusenfem?
A rock in the wind is just a funny title taking some literary freedom.
If you want to call it a rock, call it a rock, what do I care?
Just be reminded that in the original "dirty snowball" the "rock" is made of meteoritic material.
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Old 14th March 2018, 12:41 AM   #1704
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Originally Posted by Sol88 View Post
I follow the RPC tweets and I've a fair idea on the "joke"

What was the talk at Umeå on?
About "a rock in the wind"

The Rosetta mission to comet 67P/Churyumov-Gerasimenko has given us a treasure trove of data on the plasma environment around this weakly outgassing comet. In this presentation I will discuss some of the surprising findings by the Rosetta Plasma Consortium, such as “non-classical” magnetic field draping around the nucleus, the singing comet, the diamagnetic cavity and the near-tail region. First an introduction into modern cometary plasma physics will be given, starting at Alfvén and Biermann and the first cometary missions to comet 1P/Halley, before I dive into the more complicated Rosetta data set.
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Old 14th March 2018, 02:57 AM   #1705
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Originally Posted by tusenfem View Post
About "a rock in the wind"

The Rosetta mission to comet 67P/Churyumov-Gerasimenko has given us a treasure trove of data on the plasma environment around this weakly outgassing comet. In this presentation I will discuss some of the surprising findings by the Rosetta Plasma Consortium, such as “non-classical” magnetic field draping around the nucleus, the singing comet, the diamagnetic cavity and the near-tail region. First an introduction into modern cometary plasma physics will be given, starting at Alfvén and Biermann and the first cometary missions to comet 1P/Halley, before I dive into the more complicated Rosetta data set.

Well received I take it?
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Old 14th March 2018, 03:08 AM   #1706
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Originally Posted by tusenfem View Post
A rock in the wind is just a funny title taking some literary freedom.
If you want to call it a rock, call it a rock, what do I care?
Just be reminded that in the original "dirty snowball" the "rock" is made of meteoritic material.

Great Any else mind? RC? Jd116? Even me ‘ol mate fred burfle?

As rc said, for the want of a better word, ROCK will do.

Now I wonder if ANY of those SURPRISING results from the RPC mob might introduce an error in the RSI mobs signal data?

Little bit like a strong solar flare mess’n up GPS timing signals.
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Old 14th March 2018, 03:21 AM   #1707
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And you know big slice of problem pie goes in the bin when the bulk density goes toward 2-3g/cm3?

And

If the dust to water ratio implies WET DUST and a percentage is highly hydrated, be interesting to see jd116 napkin calculations, recalculated.

Sunshine’s much beloved “ice” becomes less necessary. I’m sure Whipple won’t mind too much. that’s science.
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Old 14th March 2018, 03:24 AM   #1708
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Originally Posted by tusenfem View Post
About "a rock in the wind"

The Rosetta mission to comet 67P/Churyumov-Gerasimenko has given us a treasure trove of data on the plasma environment around this weakly outgassing comet. In this presentation I will discuss some of the surprising findings by the Rosetta Plasma Consortium, such as “non-classical” magnetic field draping around the nucleus, the singing comet, the diamagnetic cavity and the near-tail region. First an introduction into modern cometary plasma physics will be given, starting at Alfvén and Biermann and the first cometary missions to comet 1P/Halley, before I dive into the more complicated Rosetta data set.
I’ll ask you one polite question, if I may?

Out of all the surprises, what surprised a space plasma physicist the most, from the Rosetta/Philea mission?

Plasma wise of course.
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Old 14th March 2018, 04:24 AM   #1709
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Originally Posted by Sol88 View Post
What did J Sunshine say on hydrated minerals on the surface of a comet?

Investigation of the states of water and OH groups on the surface of silica
Liu Peng∗, Wang Qisui, Li Xi, Zhang Chaocan


NEAR INFRARED CHARACTERIZATION OF WATER AND HYDROXYL GROUPS ON SILICA SURFACES J. H. ANDERSON, JR. and K. A. WICKERSHEIM*

WATER ABSORPTION SPECTRUM

Sunshine’s paper is too simplistic but I guess that was done on purpose for its target audience.
A complete irrelevance. How many times do you need to be told? Including an email from J. Sunshine. They detected ice in the ejecta. End of story. There was ice around Hartley 2. Alice detected ice in an outburst at 67P. Ice has been detected around other comets, and I've given you links to the papers. It is ice. There is no doubt. Now quit this nonsense, and get over it. It is hardly recent news.
And what the hell would you know about "simplistic"? You believe an idiot who thinks Velikovsky's rubbish is viable! And that solar wind H+ is going to magically combine with non-existent O- to create water! Give us a break. You simply don't understand enough about the science to question it. Neither does the idiot Thornhill.
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Old 14th March 2018, 04:52 AM   #1710
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Originally Posted by Sol88 View Post
And you know big slice of problem pie goes in the bin when the bulk density goes toward 2-3g/cm3?

And

If the dust to water ratio implies WET DUST and a percentage is highly hydrated, be interesting to see jd116 napkin calculations, recalculated.

Sunshine’s much beloved “ice” becomes less necessary. I’m sure Whipple won’t mind too much. that’s science.
More idiocy. The bulk density is nowhere near 2-3g cm-3. So a bit of a pointless claim, isn't it? No rock, and a density of ~535 kg m-3. As measured. And nothing can change that. I don't need to calculate anything. The density is measured. QED. It doesn't matter if the comet is composed of dairy milk chocolate; the density has been measured. It is a fact. Get over it.
Want me to email Jessica Sunshine again? Tell her that some unqualified woo merchant is questioning what she detected? Like she said, there is no point explaining this to various idiots, who are just going to believe their idiocy regardless. Particularly when they have books, DVDs and conference tickets to sell to their scientifically illiterate followers. Believe what you like - there is zero evidence for it.
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Old 14th March 2018, 04:56 AM   #1711
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Quote:
Now I wonder if ANY of those SURPRISING results from the RPC mob might introduce an error in the RSI mobs signal data?

Little bit like a strong solar flare mess’n up GPS timing signals.
Dear God. The idiocy. How long did this solar flare go on for? Over 2 years was it? See what I mean about scientific illiteracy? Why don't you download the RPC data, and have a look at the solar wind measurements from when the measurements were made? And for every day after that where Rosetta managed not to crash into the comet? Pure, unadulterated idiocy.
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Old 14th March 2018, 04:59 AM   #1712
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Quote:
Sunshine’s much beloved “ice” becomes less necessary
Which part of the following is beyond your ability to understand?:

IT DOESN'T MATTER ABOUT "NECESSARY"! IT IS DETECTED. END OF STORY. GET OVER IT.
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Old 14th March 2018, 05:11 AM   #1713
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Aaaaannnnddddd......more lunacy!

Quote:
Assumed to be ice 'cause that's what comets are, dirtysnowballs!

most defiantly not ROCK!!
I've already explained to you what the OSIRIS cameras are. They are not IR cameras. They are looking at dust in the coma. The ice is detected in IR. There is no chance of mistaking it for hydrated anything. Get an education on such matters, before making a fool of yourself. Again.
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Old 14th March 2018, 05:33 AM   #1714
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And the ignorance continues........

Quote:
So what are we going to call this non rocky, rocky looking stuff that is a comet?
.....he asks, having just quoted the following........

Quote:
Overhang compressive strength ranged from 3-15 Pa (upper limit 150 Pa), a 4-30 Pa
Seriously, what is the point? If you can't figure out what you're quoting, then why quote it?
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Old 14th March 2018, 05:35 AM   #1715
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Quote:
A way out of this impasse requires revision of the most common model assumption employed by the cometary community.
And again................... Jesus H. Christ. Would you like me to quote the email from Skorov again? How many times? What is it going to take? Ignorance I can forgive, but wilful ignorance not.
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Old 14th March 2018, 05:54 AM   #1716
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Originally Posted by Sol88 View Post
Great Any else mind? RC? Jd116? Even me ‘ol mate fred burfle?

As rc said, for the want of a better word, ROCK will do.

Now I wonder if ANY of those SURPRISING results from the RPC mob might introduce an error in the RSI mobs signal data?

Little bit like a strong solar flare mess’n up GPS timing signals.
Soooooo, can I call it rock, jd116?
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Old 14th March 2018, 05:58 AM   #1717
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Originally Posted by jonesdave116 View Post
A complete irrelevance. How many times do you need to be told? Including an email from J. Sunshine. They detected ice in the ejecta. End of story. There was ice around Hartley 2. Alice detected ice in an outburst at 67P. Ice has been detected around other comets, and I've given you links to the papers. It is ice. There is no doubt. Now quit this nonsense, and get over it. It is hardly recent news.
And what the hell would you know about "simplistic"? You believe an idiot who thinks Velikovsky's rubbish is viable! And that solar wind H+ is going to magically combine with non-existent O- to create water! Give us a break. You simply don't understand enough about the science to question it. Neither does the idiot Thornhill.
Not saying it was not detected, sport. You hit the nail on the head though, detected in quantities too small to account for much at all and it’s still pretty much “Dark Ice” hidden somewhere under the bedrock.

Too much dust not enough ice is the gist here champ

Except in the ELECTRIC COMET it’s not!!
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Old 14th March 2018, 06:03 AM   #1718
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Originally Posted by Sol88 View Post
Now I wonder if ANY of those SURPRISING results from the RPC mob might introduce an error in the RSI mobs signal data?

Little bit like a strong solar flare mess’n up GPS timing signals.
I have no idea what this is supposed to mean.
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Old 14th March 2018, 06:08 AM   #1719
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Originally Posted by jonesdave116 View Post
Aaaaannnnddddd......more lunacy!



I've already explained to you what the OSIRIS cameras are. They are not IR cameras. They are looking at dust in the coma. The ice is detected in IR. There is no chance of mistaking it for hydrated anything. Get an education on such matters, before making a fool of yourself. Again.



Ummmm....did you even read the paper or my post before ya chucked a wobbly?

67. Cremonese, G. et al., 2016, Photometry of dust grains of comet 67P and connection with nucleus regions, A&A, 588, A59 doi:10.1051/0004-6361/201527307

Have a read on the interpretation of blue and comet “dust”, which by the way was also used to invoke “probable ice” on the surface as stated by H Sierks and the OSIRIS mob in a few papers and then regurgitated by others.

Quote:
Photometry of coma dust grains show agreement with surface values, although some differences in composition from the surface could potentially indicate the presence of hydrated minerals [67].
So highly likely and far more probable hydrated minerals and not “ice”.

Though in cold traps why not a dusting of jack frost!

But the rock ‘aint made of ice
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Old 14th March 2018, 06:10 AM   #1720
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Originally Posted by Sol88 View Post
And you know big slice of problem pie goes in the bin when the bulk density goes toward 2-3g/cm3?.
We know the volume of 67P/CG: ~25 km3
We know the weight of 67P/cg: ~1013 kg
We know the density of 67P/CG: ~4.1E11 kg/km3 or ~0.4 g/cm3

Why ever would the bulk density go towards 2 - 3? Is there some accretion of some electrical magical powder going on that you are hiding from us?
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