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The electric field near the comet nucleus is expected if a comet is a highly negatively charged body, relative to the solar wind. Cathode sputtering of the comet nucleus will strip atoms and molecules directly from solid rock and charge them negatively. So the presence of negative oxygen and other ions close to the comet nucleus is to be expected. Negative oxygen ions will be accelerated away from the comet in the cathode jets and combine with protons from the solar wind to form the observed OH radical at some distance from the nucleus
Tallone
reply to post by wildespace
That first source you give is more specific. "Two jets are now visible in OH band (coming from water dissociation)".
The second source you gave presumes he is measuring water emission. Then he goes on to underline it is water by comparing the quantity lost to the content of a swimming pool. That for a science writer is cavalier to say the least and to my mind the kind of 'analysis' that approaches the utterly inane.
There is no requirement for OH to originate from water inside the nucleus of a comet or on the surface in the form of ice. BTW remember it has been noted already on this thread that ice on the comet surface is not excluded by the EC model.
You do not have to obtain OH from the action of solar radiation. It can also be produced by an electrochemical process.
The electric field near the comet nucleus is expected if a comet is a highly negatively charged body, relative to the solar wind. Cathode sputtering of the comet nucleus will strip atoms and molecules directly from solid rock and charge them negatively. So the presence of negative oxygen and other ions close to the comet nucleus is to be expected. Negative oxygen ions will be accelerated away from the comet in the cathode jets and combine with protons from the solar wind to form the observed OH radical at some distance from the nucleus
SOURCEedit on 22-11-2013 by Tallone because: (no reason given)
Tallone
Here is one for those on the dogwatch tonight.
Take a look at the video below and see what an X flare does to ISON when it slams into it. This is from SECCHI showing both Comet ISON and Comet Encke. This is the X flare that smacked into ISON on the 19th of this month. The action begins at 1:33 into the video. The tail and coma of ISON are stripped, and what you have left is the nucleus.
Points to be taken from this effective video by BPEarthWatch.
1. ISON does not fragment even though the flare is so powerful it rips the coma and tail away!
2. The nucleus is revealed and it looks to be ten times bigger at least than the 5 km most commonly estimated by astronomers working with the DST approach!
3. That nucleus does indeed look round (my observation here and supporting the observation of CGM above)
Now me those SECCHI images of ISON stripped by the X flare provide supporting evidence for the DST.
Ask yourself, would an icy composite withstand that shock? Consider also Comet ISON has withstood the direct impacts of X flares 3 times so far in less than five days.
Looking good for the EC model.
ollowing pointers from Wallace Thornhill, the leading proponent of the electric comet model, the Thunderbolts crew registered a series of predictions for Deep Impact on July 3, the most specific and detailed scientific predictions offered by any group in anticipation of the event. On the matter of water, we stated:
“An abundance of water on or below the surface of the nucleus (the underlying assumption of the “dirty snowball” hypothesis) is unlikely”. Though this was never a deal killer for the electric model, the absence of sufficient water in a comet is a deal killer for the dirty snowball model. We wrote: “In fact none of the electrical theorists will be surprised if the impactor exposes a subsurface with little or no ices”.
The Deep Impact team had hoped that, by excavating material from the comet's interior, they could find the one thing the standard model required. “SWAS operators were puzzled by the lack of increased water vapor from Tempel 1”. In fact, an observation from the Odin telescope in Sweden found that the relative abundance of water decreased after the impact, due to the injection of quantities of dry dust, not water.
On February 2, 2006, the official Deep Impact site, posted the headline, “Deep Impact Finds Water Ice on Comet” ...
As reported in the journal New Scientist, the water ice “is present in surprisingly small amounts”. By all accounts, the surface of Tempel 1 presented no better than 0.5 percent of the icy surface needed to account for the supposed watery output of Tempel. (The exceedingly small and thin “icy” areas were about 94 percent dirt).
But as best we can tell, until very recently there had been no public acknowledgment by NASA that none of the prior comet visits (Halley, Borrelly, Wild 2) had revealed surface water! (See below)
One other possibility for saving the snowball theory of comets was to observe the fragments of comets that have disintegrated. When comet Shoemaker-Levy-9 broke apart, astronomers reasoned that the fractured nucleus would expose fresh ices that would sublimate furiously. So several ground-based telescopes and the Hubble Space Telescope trained their spectroscopes on the tails of the fragments of SL-9, looking for traces of volatile gases. None of the gases were found. When Comet Linear disintegrated in front of their eyes, astronomers were not just shocked by the event (a comet exploding many millions of miles from the Sun), they were astonished to find virtually no water in the immediate debris.
Roughly 38 million miles from Earth and traveling at a relative velocity of 140,000 miles per hour, the speedy Comet C/2007 N3 Lulin has caught our imaginations in a big way during the beginning months of the International Year of Astronomy. Right now, Comet Lulin has already sped past the Sun, slipped by stately Saturn from our point of view and is on a parabolic trajectory heading out from our solar system. This means it will never come back…
Thanks to Joe Brimacombe, right now one of the most fascinating aspects of studying Comet Lulin as been watching its activity as it spews a hydroxyl/cyanogen gas cloud spanning over 250,000 miles across the starry background. It’s being fed by an out gassing rate of 800 gallons of “water” each second – that’s enough liquid to fill an Olympic-sized swimming pool in less than 15 minutes.
Its strange orbital geometry with a small inclination, has put it nearly on the same plane as the our solar system for a short time – giving us a long-lived anti-tail appearance as the ion tail and dust tail fan out from either side of the Oort cloud visitor. Solar wind? Plasma? We could debate for far longer on what’s caused what we can see that Lulin is going to hang around for…
So if I am reading that right, this shows a comet beyond Saturn's orbit fully active.
You are not reading this correctly. The Earth is 93 million miles from the Sun; the comet was only 38 million miles from us, putting it well within the orbit of Mars.
wildespace
I guess the whole debate about EU and EC boils down to this: what evidence do we have that the Sun is positively chrged, and the outer solar system is negatively charged? What could have created this difference of charge? Have we got reliable scinetific measurements that this is so?
RicketyCricket
But can we party on, dudes?
We exist in an electric universe, on an electric earth, in an electrically modulated system we call the human body in which we conjure electrically charged thoughts.
It seems as if electromagnetism may relate to all of our greatest profound philosophical, physical, and metaphysical questions and mysteries.
Ph03n1x
P.S does anybody else think the total lack of media interest in this once in a lifetime event extremely disconcerting...
RicketyCricket
Does anyone here speak English? I'm so lost.
alfa1
Ph03n1x
P.S does anybody else think the total lack of media interest in this once in a lifetime event extremely disconcerting...
Its not really a "once in a lifetime" event.
Comets pass through and around our solar system all the time. Anyone with a big backyard telescope can see at least one or two on any night in history. Usually more. 22 in one night is the most I'm personally aware of.
And as for comet ISON, it is only newsworthy because a year ago it was thought to be spectacular and sensationally described as "brighter than the moon". Now we know its not so much, its a very ordinary comet indeed.
If comet ISON had been discovered a few months ago when its real (fainter) brightness was known, there would not be a single thread about it on ATS. Not a single one. And if discovered a few months ago, it might merely have made a tiny paragraph on the bottom of page 12 of a newspaper.
reply to post by crzayfool
I have a big backyard telescope and I don't see anything quite as spectacular as ISON in the sky at the moment, mainly for the cloud - but even so I am out there often scanning the skies and this is the first time I have heard of a comet giving a tail / coma to a planet, Mars... I remember Hale Bopp and Halley's but I don't recall the same info as ISON floating around at the time (and I was too young to dig around for it, so maybe that's why).
Granted I am no astrophysicist but even without all the hype in the media why are so many people talking about it here on ATS if it's so 'ordinary'?
I don't understand why we'd all waste our time if it's just another comet...