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  #301 (permalink)  
Old 22-January-2007, 03:21 PM
Starboy Starboy is offline
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3. Naturally if you like you can take into account the coma and the tail of the comet. but then the charges in there would just separate and nothing would happen in the nucleus. This calculation was meant to get the voltage over the nucleus, and a possible electric discharge at the surface. With a nucleus of a few km, the voltage build up by induced electric field would be way too small to get any sparking effect.
Ahhh..so basically we just differ here (My bold)

Quote:
voltage build up by induced electric field would be way too small to get any sparking effect.
But if this is "sparking" we observe, then what’s the voltage? PS Seen some wicked voltage built up by induced electric/magnetic fields and capacitors

Quote:
4. I see, now it is Birkeland currents flowing in the comet's halo, doing pinching and stuff. I thought there were discharges. Get your model together, boy.
Didn’t mentions what directions thaysa going'n there partner do you think they "flow" in?

I think there much like stronger versions of Mars electric "dust devils"

Quote:
5. The Earth's velocity was there just to see if my estimate of 100 km/s for the comet was not outrageously out of place.
But my way of thinking is, it's in relative to Sol? Not relative to us at all then really, here on Earth (Though I suspect all planetary magnetic fields would influence the comet and vis a vis ) Wild weather you say over in Austria? Something about Jetstreams or some such, I thought I'd read somewhere.


Quote:
Up to now there is no proven electric charge density of the sun, so that would be 0.
We've measured it (electric charge density) of the sun from widely separated orbits from Sol? (real time, instantaneous readings from say, out past Saturn and say Mercury?)
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Old 22-January-2007, 03:49 PM
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Quote:
Originally Posted by Starboy View Post
1, Ahhh..so basically we just differ here (My bold)
2. But if this is "sparking" we observe, then what’s the voltage? PS Seen some wicked voltage built up by induced electric/magnetic fields and capacitors
3. Didn’t mentions what directions thaysa going'n there partner do you think they "flow" in? I think there much like stronger versions of Mars electric "dust devils"
4. But my way of thinking is, it's in relative to Sol? Not relative to us at all then really, here on Earth (Though I suspect all planetary magnetic fields would influence the comet and vis a vis)
5. Wild weather you say over in Austria? Something about Jetstreams or some such, I thought I'd read somewhere.
6. We've measured it (electric charge density) of the sun from widely separated orbits from Sol? (real time, instantaneous readings from say, out past Saturn and say Mercury?)
1. the problem that you don't seem to comprehend is that the charge separation in the halo would "turn off" the electric field in the halo, and thus nothing will happen in the nucleus, because it experiences no electric field.

2. First of all it is not sparking, secondly, if it were, you can do the math yourself to calculate the needed electric voltage.

3. I don't think anything, you suddenly come up with Birkeland currents and pinches, which up to now had no place in the discussion of your sparking. So, I don't care how they would flow (as they don't) and will leave it up to you to tell us all about them.
So, either you are telling us here that birkeland currents are electrical dust storms at mars or you are telling us that these dust storms (not being birkeland currents) are taking place in the comet.
Please, for once write a sensible model of the EC and maybe this discussion will go somewhere.

4. The fact that you still don't understand why I put the velocity of the Earth in that message bodes ill for you. As I told you, I chose a velocity of the comet through the solar system (on its elliptical orbit) and to see whether this was not totaly ridiculous, I compared that velocity with the velocity of the Earth in it elliptical orbit around the sun. Capice? My goodness, I don't know why I take the effort to type all this.

5. Storms over Europe, yeah, once in about every 15 years such a hurricane happens in nothern Europe, I guess it was time again.

6. We have measured zilch! Not one probe has measured that there was a net electric charge floating around in the solar system. The solar wind plasma is neutral, however consists of differently charged particles, positive ions and negative electrons. There have been measurements around Venus, Earth, Mars, Jupiter and Saturn, with modern instruments. There is no net charge of the solar wind.
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  #303 (permalink)  
Old 22-January-2007, 03:51 PM
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Quote:
Originally Posted by Starboy View Post
Have Hubble, Swift, Rosat etc had a look at this comet yet?

XMM-Newton has, LINK

[snip]

I am not capable of doing the maths required (How can maths be of help anyway, with such dynamic phenomena? the solar "wind" is'nt even constant) so your bluff wins there.
Quote:
Originally Posted by Nereid
what, exactly, is the ATM 'electric comet' (EC) idea?


[snip]

So it's not excatly my theory, I just tend to agree with it
Quote:
how much, if any, 'new physics' is involved in this idea?
Some 'new physics' may be involved, it may help us with space exploration these plasmas seems to very dynamic and we still do not understand fully what is going on, hence my interest.
Quote:
* if the EC idea is not quantitative, how it could be tested, in principle, using today's technology?
Train our full range of intruments on each and every comet that comes our way, if the "bright spots" on a comets nucleus's are dynamic, then we should be able to "see" them move/change/disappear/reappear in infrared, UV X-rays, when we have enough resolutution I spose and rosetts mission will be crucial.
Quote:
* if this idea has advanced beyond a purely qualitative, word salad idea, and you (or any other proponent of it) wish to call it a theory or model, where are the details of any such theory or model published?
From NASA, ESA and soforth You would likey not find anything in the mainstream, as I'm sure you Neried, are aware. Though in the short time I've been studying this phenomena, the "maistream" view seems to be changing to inculde more "electrical/plasma" phenomena and less "vaporizing/sublimating" dirtysnowball phenomena. Slowy slowy.
Quote:
* if the EC idea involves electric currents, can we have a circuit diagram please?
That would be great would'nt it I do not know, but I expect it has something to do with the Sun, heliopuase, IPMF, double layers, so on and soforth.
Please take the time to read the Electric Universe Model., thread, specifically the extensive set of posts on the 'electric comet' ideas.

Please re-Read this first, re posting "Electric Universe" ideas here.

When you have 'electric comet' material ready, that properly addresses the guidelines for discussion of specific, concrete, focussed EU ideas, please PM me or another mod, and this thread will be reopened, to allow you to post that material.

Please be very sure that what you prepare is not simply a repeat of the contents of the posts in the EU model thread, or this one.

ATKINS: if you have answers to the questions here, please PM me or another mod, and this thread will be re-opened so you may post them.

Thread closed.
  #304 (permalink)  
Old 23-January-2007, 09:27 PM
Nereid Nereid is offline
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[Moderator Note]

Thread re-opened, at VanderL's request.

VanderL, would you please provide a clear statement of the scope of the ATM 'EC idea' that you wish to cover?

[/Moderator Note]
  #305 (permalink)  
Old 23-January-2007, 10:38 PM
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Originally Posted by Nereid View Post
[Moderator Note]

Thread re-opened, at VanderL's request.

VanderL, would you please provide a clear statement of the scope of the ATM 'EC idea' that you wish to cover?

[/Moderator Note]
In response to the earlier questions by Nereid to provide answers to these questions:
Quote:
Originally Posted by Nereid
Second, this post (#294) may help (paraphrasing somewhat):

* what, exactly, is the ATM 'electric comet' (EC) idea?

* how much, if any, 'new physics' is involved in this idea?

* if this idea has advanced beyond a purely qualitative, word salad idea, and you (or any other proponent of it) wish to call it a theory or model, where are the details of any such theory or model published?

* if the EC idea is not quantitative, how it could be tested, in principle, using today's technology?

* if the EC idea involves electric currents, can we have a circuit diagram please?
I cannot provide a complete theory, so I do not wish to provide details or specifics (like a circuit diagram) that do not exist (yet), and I don't have the time, nor the expertise to work them out myself.

What I can do is provide all the quantitative material that I can find, which means that I am looking for:
1. Supportive evidence (as in the the earlier link to "lunar soil water").
2. Details from the missions that study comets and argue how they fit in.
3. Look for specific tests, or new data that can be used to verify/refute an EC model.

So, in the EC model the assumption is that comets are negatively charged wrt their environment. That means the model is really quite simple, and the question where the charge comes from is irrelevant until the evidence of the assumed charge difference is reasonably established.

What I will try to do is list the reasons (supportive evidence) that comets can be considered "electrical" in nature, include a list of tests that can verify/refute an EC model and also try to answer questions.
(more later...)

Cheers.
  #306 (permalink)  
Old 24-January-2007, 05:57 AM
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Originally Posted by VanderL View Post
In response to the earlier questions by Nereid to provide answers to these questions:


I cannot provide a complete theory, so I do not wish to provide details or specifics (like a circuit diagram) that do not exist (yet), and I don't have the time, nor the expertise to work them out myself.

What I can do is provide all the quantitative material that I can find, which means that I am looking for:
1. Supportive evidence (as in the the earlier link to "lunar soil water").
2. Details from the missions that study comets and argue how they fit in.
3. Look for specific tests, or new data that can be used to verify/refute an EC model.

So, in the EC model the assumption is that comets are negatively charged wrt their environment. That means the model is really quite simple, and the question where the charge comes from is irrelevant until the evidence of the assumed charge difference is reasonably established.

What I will try to do is list the reasons (supportive evidence) that comets can be considered "electrical" in nature, include a list of tests that can verify/refute an EC model and also try to answer questions.
(more later...)

Cheers.
(my bold)

How much charge, in the EC idea, do comets have (wrt their environments)?

It would seem that, if all there is to the EC idea is "comets are negatively charged wrt their environment", we can all go home now ... even a net charge of just 1.6 x 10-19 C would be sufficient.

If we could find a comet which has a net positive charge (wrt its environment), would that falsify the EC idea (as you have presented it)?
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Old 24-January-2007, 09:31 AM
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I am sorry, but I have the feeling this is going to be just more blahblah.
Lots of qualitative word salat, that becomes increasingly difficult to refute in any reasonable length message. And why is it that only the non-capable of physics and math seem to put forward that the comets are electric?
A very sceptical mainstreamer here.
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Old 25-January-2007, 11:56 PM
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because you people who rely on Math don't see the bigger picture of course!
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  #309 (permalink)  
Old 28-January-2007, 05:41 PM
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Quote:
Originally Posted by Nereid View Post
How much charge, in the EC idea, do comets have (wrt their environments)?

It would seem that, if all there is to the EC idea is "comets are negatively charged wrt their environment", we can all go home now ... even a net charge of just 1.6 x 10-19 C would be sufficient.
The charge of a comet wrt it's environment changes during it's orbit. The difference is highest when the comet is close to the Sun, and almost negligible at aphelion. So to better state the EC idea; for any object in the solar system to show cometary activity (asteroids included) a net charge difference must exist.

Quote:
Originally Posted by Nereid View Post
If we could find a comet which has a net positive charge (wrt its environment), would that falsify the EC idea (as you have presented it)?
I don't know for sure if a positively charged object would also show cometary characteristics, I imagine that any charge difference automatically leads to some sort of discharging. But to answer your question, yes, it would falsify the EC idea as I presented it.

Cheers.
  #310 (permalink)  
Old 29-January-2007, 02:29 PM
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The charge of a comet wrt it's environment changes during it's orbit. The difference is highest when the comet is close to the Sun, and almost negligible at aphelion. So to better state the EC idea; for any object in the solar system to show cometary activity (asteroids included) a net charge difference must exist.
And how does this comet pick up this charge, and why is it then not removed by all the free floating positive charge of the solar wind?
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  #311 (permalink)  
Old 31-January-2007, 06:45 AM
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And how does this comet pick up this charge, and why is it then not removed by all the free floating positive charge of the solar wind?
How long would it take to "remove" (equalize) this charge, remembering that it is moving into a region of increasing difference. Seems to me it couldn’t until it started to move away from the sun or "disintegrated" from electrical over stress.

And I would surmise that the "free floating" positive charge's from the sun's EM field is removing electrons from the comet, hence the observed effects i.e. jets, coma UV, X-rays and so on.

But I'm afraid again, I can not supply the math’s to the level required to "explain" this to people more proficient in said discipline than me.

Quote:
The charge of a comet wrt it's environment changes during it's orbit. The difference is highest when the comet is close to the Sun, and almost negligible at aphelion. So to better state the EC idea; for any object in the solar system to show cometary activity (asteroids included) a net charge difference must exist.
And it seems, they must move on an ecentric orbit, or be within/under the influence of a strong EM field i.e. moons of the gas giants.
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Old 31-January-2007, 06:52 AM
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But I'm afraid again, I can not supply the math’s to the level required to "explain" this to people more proficient in said discipline than me.
So, like, does that mean you haven't convinced your own skeptical self yet? Or are you able to be swayed by lesser evidence?
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Old 31-January-2007, 09:36 AM
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How long would it take to "remove" (equalize) this charge, remembering that it is moving into a region of increasing difference. Seems to me it couldn’t until it started to move away from the sun or "disintegrated" from electrical over stress.

And I would surmise that the "free floating" positive charge's from the sun's EM field is removing electrons from the comet, hence the observed effects i.e. jets, coma UV, X-rays and so on.

But I'm afraid again, I can not supply the math’s to the level required to "explain" this to people more proficient in said discipline than me.
As usual the to-be-expected wordsalat.
First of all, it is not the question how long it would take to remove the charge, the first question is how the charge gets there in the first place. And what do you exactly mean when you say: it is moving into a region of increasing difference. Increasing difference of what? Density, magnetic field, solar power, Earth distance? And how does this difference affect the comet?

I think that if the comet would only be a teenyweeny bit negatively charged, then the solar wind positive charge would quickly take that away. Well, maybe just like space craft charging, a slight net charge could be created, but I expect nothing like the excessive charge that would be needed for the effects that you state, apart from the fact that they can be easily explained with the regular comet theories.

Please, try to edumacate yourself in some phys and math. And apparently, there are no EC proponents that are qualified in phys and math, otherwise we would already have had a reasonably complete EC model to discuss, instead of word salat.


Quote:
Originally Posted by Starboy View Post
And it seems, they must move on an ecentric orbit, or be within/under the influence of a strong EM field i.e. moons of the gas giants.
I assume that you mean "e.g." (exempli gratia, means: for example) instead of i.e. (id est, means: that is), but anyway, what are you trying to say here? Comets behave the same as the Jovian moons and their interaction with the strong magnetic field of Jupiter?
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  #314 (permalink)  
Old 01-February-2007, 01:45 AM
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So if a comet has a magnetic field, such as
Quote:
An induced magnetosphere of a comet rotates around the Sun–comet line along with the interplanetary magnetic field (IMF) vector. During the Giotto flyby near comet Halley the direction of the IMF changed several times. For this reason, the trajectory of the Giotto spacecraft, being represented in the IMF-related coordinate system, covered rather well the transverse cross section of the comet Halley magnetosphere. As a result, two-dimensional distributions of both the magnetic field and electric current density have been calculated in the transverse cross section of the induced magnetosphere of comet Halley. The distributions reveal the following facts. The magnetic barrier is axially symmetric (within the accuracy of the grid ∼103 km). Such a behavior is associated with the fact that the magnetic field strength in the barrier is governed by the dynamic pressure of the solar wind and does not depend on the ion-neutral friction (which affects only the location of the magnetic field maximum). Along with draping about the dayside of a comet, magnetic field lines also drape about its flanks (where the magnetic field turns out to be enhanced). As a result, the Lorentz electric field inside the cometary ionosphere decreases. Lines of the electric current drape about the cometary ionosphere in a manner resembling the magnetic lines. The region of the magnetic barrier in front of the contact surface is shown to be an electric load for the MHD generator arising as a result of the solar wind interaction with a comet. © American Geophysical Union 1994]
LINK

With a speed of

Quote:
[This gives a observed, real speed = 43 km/sec / sin(46) = 60 km/sec = 215000 km/sec.

Maybe a bit too high, the real speed should be something in the range of 52 km / sec.
This slight (15%) deviation is of course due to several error sources, one reason is our distance-result being (13% )too high too. Still, no question, any collision with such an object would release an enormous energy.

From the above data, and an assumed comet head of 2 km , our students calculated an impact energy equivalent to million megatons, equivalent to several hundred nuclear wars . In 1990-91 data were published, showing that an enormous , 180 - 300 km wide circular structure below the Yucatan Peninsula in Mexico, could be an impact crater, maybe associated with the extinction of the dinosaurs.

Estimates tell the implied energy of this particular object would be 10 million million megaton TNT. (1 megaton TNT is equal to 1250 million kiloWatt-hour).
LINK
How many kilowatt hours is that? Either which way it's a lot of energy!

And the Heliocentric IMF,
Quote:
The electric currents in the Sun generate a complex magnetic field with extends out into interplanetary space to form the interplanetary magnetic field. As the Sun's magnetic field is carried out through the solar system by the solar wind, the Sun is rotating. Its rotation winds up the magnetic field into a large rotating spiral, known as the Parker spiral
LINK

As well as the “solar wind” which,
Quote:
The outermost region of the Sun, corona, is indeed very hot, so hot that the hydrogen and helium can escape gravitational attraction and form a steadily streaming outflow of material called the solar wind. Because of its high temperature and constant illumination by the Sun, solar wind is fully ionized plasma. Furthermore, because of the heating, compression, and subsequent expansion, the solar wind becomes supersonic above a few solar radii. At Mercury, the solar wind Mach number is about 3, while at the outer planets, Mach number can be 8 and above.
Mmmm... so what could cause Sol's corona to get so "hot" and accelerate plasma's into space and then keep accelerating them to higher speeds? The interior of the Sun? Meh

Quote:
The solar wind plasma consist of primarily of hot electrons and protons with a minor fraction of He2+ ions and some other heavier ions (typically at high charge states). The table lists the basic solar wind characteristics.
The solar wind originating from the streamers (closed field lines) is slow, while that originating from the coronal holes is fast. This creates the so-called "corotating interaction regions" (CIR) in the interplanetary space. As the solar wind moves away from the sun, tangential discontinuities and interplanetary (fast) shocks are formed, creating pressure variations.}
LINK

So an example below might be relevant? Just swapping the variables with those below with some of the ones we know about in regard to the IMF, Comet speed etc etc and if we throw in the comet nucleus may very well be of a slightly lower charge than it's immediate environment and not able to readily equalize this charge, because of the variables mentioned above.

Quote:
Example 20: A pathetic generator

◊ The horizontal component of the earth's magnetic field varies from zero, at a magnetic pole, to about 10-4 T near the equator. Since the distance from the equator to a pole is about 107 m, we can estimate, very roughly, that the horizontal component of the earth's magnetic field typically varies by about 10-11 T/m as you go north or south. Suppose you connect the terminals of a one-ohm lightbulb to each other with a loop of wire having an area of 1 m2. Holding the loop so that it lies in the east-west-up-down plane, you run straight north at a speed of 10 m/s, how much current will flow? Next, repeat the same calculation for the surface of a neutron star. The magnetic field on a neutron star is typically 109 T, and the radius of an average neutron star is about 104 m.

◊ Let's work in the frame of reference of the running person. In this frame of reference, the earth is moving, and therefore the local magnetic field is changing in strength by 10-9 T/s. This rate of change is almost exactly the same throughout the interior of the loop, so we can dispense with the summation, and simply write Faraday's law as



Since what we estimated was the rate of change of the horizontal component, and the vector A is horizontal (perpendicular to the loop), we can find this dot product simply by multiplying the two numbers:

ΓE = (10-9 T/s)(1 m2)= 10-9 T⋅m2/s
= 10-9 V

This is certainly not enough to light the bulb, and would not even be easy to measure using the most sensitive laboratory instruments.
Now what about the neutron star? We'll pretend you're tough enough that its gravity doesn't instantly crush you. The spatial variation of the magnetic field is on the order of (109 T/104 m)=105 T/m. If you can run north at the same speed of 10 m/s, then in your frame of reference there is a temporal (time) variation of about 106 T/s, and a calculation similar to the previous one results in an emf of 106 V! This isn't just strong enough to light the bulb, it's sufficient to evaporate it, and kill you as well!

It might seem as though having access to a region of rapidly changing magnetic field would therefore give us an infinite supply of free energy. However, the energy that lights the bulb is actually coming from the mechanical work you do by running through the field. A tremendous force would be required to make the wire loop move through the neutron star's field at any significant speed.
LINK

So we have at least, a rocky body with a magnetic field moving at great velocity(Kinetic energy) through a highly variable magnetic field and highly charged plasma stream on varying degrees of eccentricity and angle, with reference to the IMF.

In addition the plasma sheath that forms around the nucleus can be 10’s million Km wide by 100’s million Km long, or act as akinda large Ampèrian surface, which no doubt interacts with other magnetosphere’s within the IMF

So, I think, my interpretation of it is not quite psudoscience, just not very well investigated phenomena (well maybe investigated, but from the wrong point of view IMHO.)


So what numbers shall we plug in?

Last edited by Starboy; 01-February-2007 at 04:35 AM..
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Old 01-February-2007, 09:06 AM
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I see you have been harvesting again.
Indeed the solar wind magnetic field drapes around the comet. This is not a magnetic field generated by the comet's interior. The maximum magnetic field strength around the comet according to Irsaelivich and Ershkovich is 50 nT, that is 50 x 10-9 T, which means that it is about 4 orders of magnitude smaller than in your example on Earth (the pathetic generator). The currents flowing around the comet, creating the "ionosphere" separating the magnetic boundary from the diamagnetic cavity is less then 8 microAmps/m2, and more likely in this model to be 1 nanoAmp/m2.

Now, what do you need the kinetic energy for? In electrodynamics only the velocity of the object counts (unless e.g. you want to convert flow energy to magnetic energy using the Kelvin-Helmholtz instability). Okay, it has a lot of energy if it would plow into the Earth, but who cares how many kiloWatthours that represents?

Then you found the Parker spiral, and you discovered the solar wind. Did you ever realise that the two may be related?

Powering the solar wind, is still an interesting research topic. There are several models, and most likely it is a combination of various kinds of heating an outward pressure. I am not going through the whole gamit but you can read up on it in the book by Lamers & Cassinelli, Introduction to Stellar Winds.

If I am not mistaken, the Parker spiral field falls off as 1/r, so the background field is not so highly variable. Naturally there will be flares and CMEs, but these are local things and may not interact with the comet.

And what is an Amperian surface?

The Earth has flown through the tail of Comet ... (I cannot get the name right now) about 6 years ago. I don't think anything happened. This is because the magnetic field of the comet's tail will have reduced so much that it is back again at IMF values. What you will see is the dust trail behind the comet (which naturally was believed to carry deseases and disaster if the Earth would fly through it).

So, I think your interpretation leaves lots and lots of questions that need to be answered.

Quote:
Originally Posted by Starboy
So what numbers shall we plug in?
You tell me, it is your idea, but with a field of 50 nT your "pathetic generator" becomes a "pathetic example".
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Old 01-February-2007, 01:20 PM
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So my best friend asked me something this evening that I couldn't answer.

In the EU "model," what is the physical substance of comets? What are they actually made of? We know they have a physical substance, because we've sent probes to several. (Well, two, that I can name, anyway.) I'm kind of curious as to where they come from in an EU concept, but I'll settle for what they're made of.

She's also curious as to why people come up with these ideas, but I don't think there's ever going to be a satisfactory answer to that, since to EU proponents, it's obvious, and to the rest of us, it doesn't make any sense.
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Old 01-February-2007, 09:13 PM
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Originally Posted by Gillianren View Post
So my best friend asked me something this evening that I couldn't answer.

In the EU "model," what is the physical substance of comets? What are they actually made of? We know they have a physical substance, because we've sent probes to several. (Well, two, that I can name, anyway.) I'm kind of curious as to where they come from in an EU concept, but I'll settle for what they're made of.
Comets have the same composition (and diversity) as asteroids.

Quote:
Originally Posted by Gillianren View Post
She's also curious as to why people come up with these ideas, but I don't think there's ever going to be a satisfactory answer to that, since to EU proponents, it's obvious, and to the rest of us, it doesn't make any sense.
The electric comet idea is very old (19th century), it was not until the early sixties that Ralph Juergens realised that comets as an electrical phenomenon makes better sense than than Whipple's snowball model. A summary of the history of the electric comet can be found
here.

Cheers.
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Old 01-February-2007, 10:03 PM
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And how does this comet pick up this charge,
Well, I could tell you what I think and I can tell you what EU theorists think, but for the moment it would be better to start with the assumption that the activity that comets show is caused by a differential charge. The onus is on the proponents to "prove" it, but that won't happen very soon. As of now, all we have is circumstantial evidence, the same as the snowball model; no one has actually proven that pockets of subsurface water ice (or other volatiles) is heated to produce cometary jets.

Quote:
Originally Posted by tusenfem View Post
and why is it then not removed by all the free floating positive charge of the solar wind?
That's exactly what is happening! The process of getting into equilibrium is what causes the plasma phenomena like the coma, plasma tail, arcs ("bright spots") and EDM (fine dust) and jets. The plasma around the comet organizes into a "bubble" where the charge difference is concentrated in the double layers (actually several, the largest of which contains the "Hydrogen cloud").

Before you start the "word salad" stuff (I think you mean word salad, not wordsalat) again, I fully agree this model lacks many specifics, but model is falsifiable even without having all kinds of specifics (like the amount of charge, densities and electric field strengths).

In an earlier post I mentioned some ways to do this with current technology. Ideally we would want:
1. a camera recording the dynamic behaviour of the jets and their sources from quiescence to maximum activity
2. a plasma instrument close to the comet and
3. a lander collecting samples from the comet (also from below the surface)

The Rosetta misson could fulfill this task, maybe not on all points, but at least some. This could show us exactly if indeed the comet jets are produced by arcs or evaporating gases, if the comet is made of ice or rock and if the comet's surface is fluffy and porous, or rock hard and "machined" by electric arcs. In the meantime EU proponents try to find supporting evidence for the EC idea and answer questions.

Cheers.

Maybe as an aside a question for the challengers: what evidence would falsify the snowball model (or it's current watered-down "muddy fluffball" incarnation).
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Old 02-February-2007, 05:39 AM
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Then you found the Parker spiral, and you discovered the solar wind. Did you ever realise that the two may be related?
Right from the start

Quote:
bluish plasma tail, which consists of ionized gas being emitted by the comet and picked up by the magnetic field being swept along by the solar wind.
Quote:
"We are particularly interested in the comet's plasma tail, which 'turned on,' or began to outgas, when Hale-Bopp was about 1.5 astronomical units (140 million miles) from the Sun
Quote:
Cometary plasma tails change constantly due to their interactions with slow and high-speed solar wind
Quote:
"This magnetic field reversal typically happens in the equatorial regions twice per solar rotation, or about every 13 days. They don't occur at high latitudes."
Parker spiral mebe? LINK

Also

Quote:
If I am not mistaken, the Parker spiral field falls off as 1/r, so the background field is not so highly variable. Naturally there will be flares and CMEs, but these are local things and may not interact with the comet.
But they very well may!, from same link
Quote:
Ulysses has studied the steady, high-speed winds at high latitudes, and alternating, slow and fast winds near the Sun's equator. Hale-Bopp is about to enter the lower latitude zone, where the disturbed solar wind resides, and where dramatic changes in the comet's plasma tail are expected to occur."
Quote:
"At equatorial latitudes, the solar wind moves at an average speed of about 450 kilometers per second (970,000 miles per hour) with large variations in speed and density," Brandt continued. "This type of wind apparently comes from the equatorial streamers so clear at solar eclipses. The plasma tail of a comet experiencing this part of the solar wind has a distinctly disturbed appearance which varies over time, and undergoes disconnection events as it experiences reversals of the magnetic field.

"By contrast, when the same comet travels through the polar latitudes, it encounters a more steady, less dense and faster solar wind, moving at about 750 kilometers per second or 1.6 million miles per hour," Brandt said. "There are smaller variations in speed and density and no magnetic field reversals. Consequently, the plasma tail looks much less turbulent and does not have disconnection events. So, the comet, by acting as a 'solar wind sock,' can be used to map the conditions in different latitudes of the solar wind."
So we agree there is a dynamic wave structured rotating magnetic field that varies it's flux dynamically on relatively short time spans? Basically like a bar magnet spinning along it's vertical axis ?

So if a slightly magnetic/charged "rock" heads on thru it, you'd have a
Quote:
plasma tail of a comet experiencing this part of the solar wind has a distinctly disturbed appearance which varies over time, and undergoes disconnection events as it experiences reversals of the magnetic field.
or one would expect, if the were interacting somewhere on the EM spectrum.

Which brings me to this:
Quote:
Now, what do you need the kinetic energy for?
Is there not some form of energy conservation laws going on here Shouldn’t the comet be slowing down a little by this exchange of energy? Takes some grunt to power EDM and Nucleosynthesis , but booya she's got some energy of motion there.

And so I understood the Amperian surface, can be taken has the whole surface area of a curly magnetic field being available for help in inducing magnetic field/s, so if you calc of
Quote:
8 microAmps/m2, and more likely in this model to be 1 nanoAmp/m2.
this I take, was over the entire surface area of a comets coma, corona and tail? And then that power:
Quote:
who cares how many kiloWatthours that represents
KiloWatts? maybe MegaWatt-Gigawatt Hrs be focused/pinched in to a small area, it could then be available to do "work"


Quote:
I'm kind of curious as to where they come from in an EU concept, but I'll settle for what they're made of.
I'd say much the same as rocky/irony <sp?> asteroids/moons the higher the iron/metal content, the better conductors they would be? e.g able to sustain a greater "load".
  #320 (permalink)  
Old 02-February-2007, 06:09 AM
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Quote:
The Earth has flown through the tail of Comet ... (I cannot get the name right now) about 6 years ago. I don't think anything happened. This is because the magnetic field of the comet's tail will have reduced so much that it is back again at IMF values. What you will see is the dust trail behind the comet (which naturally was believed to carry deseases and disaster if the Earth would fly through it).
May very well be true, but these things are huge (tails<> '00 Millions Km) and they would appear to be electrically conductive to some extent still? I just "see" them "draping" over our planet as well, maybe enhancing aurora or giving the ionosphere a bit a tickle. And considering some of the latest evidence, of a connection between the Ionosphere and weather patterns....
Quote:
(which naturally was believed to carry deseases and disaster if the Earth would fly through it)
now what were the main "disasters" foretold by those silly, unedgeamucated "ancient civilizations" Mmmmm....? Impacts with comets might be extremely rare, but their EM interaction with our magnetosphere (and other planets) may not be!
  #321 (permalink)  
Old 02-February-2007, 09:17 AM
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Quote:
Originally Posted by VanderL View Post
Well, I could tell you what I think and I can tell you what EU theorists think, but for the moment it would be better to start with the assumption that the activity that comets show is caused by a differential charge. The onus is on the proponents to "prove" it, but that won't happen very soon. As of now, all we have is circumstantial evidence, the same as the snowball model; no one has actually proven that pockets of subsurface water ice (or other volatiles) is heated to produce cometary jets.
You can assume anything you want.

Quote:
Originally Posted by VanderL View Post
That's exactly what is happening! The process of getting into equilibrium is what causes the plasma phenomena like the coma, plasma tail, arcs ("bright spots") and EDM (fine dust) and jets. The plasma around the comet organizes into a "bubble" where the charge difference is concentrated in the double layers (actually several, the largest of which contains the "Hydrogen cloud").
And how much charge is needed for that, and how much voltage?
How can a double layer contain a hydrogen cloud?
And linking to the "renske" page, in your post to Gillianren, well if that is all the EC community can come up with...

Quote:
Originally Posted by VanderL View Post
Before you start the "word salad" stuff (I think you mean word salad, not wordsalat) again, I fully agree this model lacks many specifics, but model is falsifiable even without having all kinds of specifics (like the amount of charge, densities and electric field strengths).
The model lack everything. After asking a zillion times to make this all a little more qualitative, put some number on it, we get zilch.
But naturally, if you keep your model vague enough, then you can always say that whatever is observed was predicted by your EC model.
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  #322 (permalink)  
Old 02-February-2007, 04:28 PM
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Originally Posted by tusenfem View Post
You can assume anything you want.
The point is to try and "prove" the assumption

Quote:
Originally Posted by tusenfem View Post
And how much charge is needed for that, and how much voltage?
How can a double layer contain a hydrogen cloud?
I was proposing to try and first make it likely ("prove") that indeed comets are electrical, the details of how much charge, voltage, densities etc, would come later.

Quote:
Originally Posted by tusenfem View Post
And linking to the "renske" page, in your post to Gillianren, well if that is all the EC community can come up with...
The point for the "Rense" link was not to give you a complete model (admittedly tehre is no complete model), merely to show that the idea of electrical comets is old, and who started it approximately when.

Quote:
Originally Posted by tusenfem View Post
The model lack everything. After asking a zillion times to make this all a little more qualitative, put some number on it, we get zilch.
I can't give you what is not there, but I can try and falsify the model before any quantitative detail is known. So I don't see the point in speculating about the amount of charge needed, and speculating where it all comes from (we don't have the strength of the radial electric field centered on the Sun yet) without verifying that the premise of an electric comet has past the first test; being viable.

Quote:
Originally Posted by tusenfem View Post
But naturally, if you keep your model vague enough, then you can always say that whatever is observed was predicted by your EC model.
Conversely, one can always argue that predictions (recall Deep Impact where an early flash, no ice, more energy release than predicted by mainstream) do not count as predictions for all kinds of reasons. I would argue that we need to concentrate on the differences that should really distinguish the electric model from all others (the "snowball" model in it's various forms).

Cheers.
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Old 04-February-2007, 11:56 PM
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So the nuts and bolts of the situation:

Quote:
Conversely, one can always argue that predictions (recall Deep Impact where an early flash, no ice, more energy release than predicted by mainstream) do not count as predictions for all kinds of reasons. I would argue that we need to concentrate on the differences that should really distinguish the electric model from all others (the "snowball" model in it's various forms).
So, what would falsify the "snowball" model (in all its flavour's)

and then

What would falsify the "Electric" model (and all it's flavours)

Remembering what the implications are!
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Old 05-February-2007, 12:27 AM
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why don't you tell us?
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Old 05-February-2007, 12:41 AM
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Quote:
Originally Posted by Starboy View Post
What would falsify the "Electric" model (and all it's flavours)

Remembering what the implications are!
the only implication I could tink of is that you are wrong, I don't have any problem with that because you are.
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Old 05-February-2007, 07:21 AM
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the only implication I could tink of is that you are wrong, I don't have any problem with that because you are.
Is that Ad homium

Anyways

captain swoop wrote:
Quote:
why don't you tell us?
Which ones? I'd thought I'd give it a go, compiling a list, but the "mainstream" or currently accepted model is in a constant state of flux. Which "source"/"expert" shall I quote?

Or to make it a bit easier, in which theory do you subscribe to Cap'n Swoop

As for the EC theory I'm gunna stick with the Thunderbolts and Holosciences version without having to repeat argumentum ad nauseam, the stonework of this theory. Needless to say davidlpf the implications are huge! Well, for "current theory" anyway.
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Old 05-February-2007, 08:31 AM
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Is that Ad homium
No. ("Ad hominem.") "You are wrong" is not an insult. It's intended as a statement of fact. You, of course, have every opportunity to prove that statement in error by showing that you're actually right, but I don't see you being able to do that any time soon.

Let me ask you a question, here, Starboy, because I've never really gotten a straight answer when I ask this sort of thing.

It's come across as fairly obvious that you don't know a heck of a lot about the standard model going in--such as all those probes to Halley's Comet, for example. This means, at least it seems to mean, that you haven't come across a quirk in the model after years of studying it. You've just decided it's wrong. Why? What made you interested in the first place? And what made you decide electric comets made a better model? Especially since I don't even know how the electric comet model works. Say what you like about the icy dirtball/dirty snowball theory; it's been explained so that I understand pretty much everything I, the lay scientist, need to know.
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Old 05-February-2007, 11:08 AM
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I was thinking of writing up the characteristics of comets. But I think wiki does not do a bad job, so I leave it with that.

Then the tails of the comet. First there is the dust tail, dust being blown away from the comet by the solar wind. This one is straight and pointing away from the sun. Is this tail connected to the comet? Well, if you call a connection that you can trace the dust back to the comet, then yes, if you call a connection physical, i.e. that there can still be interaction, I would say no. The dust has left the comet and the gravity of the comet is too small to do anything about it. The only reason there seems to be a connection is because the dust tail gets created continually.

Then the ion tail. This one is created by ions picked up by the solar wind magnetic field that passes by. Because of the bendedness of this magnetic field the ion tail is not straight but curved. The ions are mainly created by UV ionization of particles near the nucleus. The ion tail remains bright, because the ions will be excited by the solar radiation and will emit while de-exciting. Now, is there a connection between the comet and the ion tail. As with the dust tail, the ions are blown away, but have to follow the solar wind magnetic field, and thus follow a curved path. Also this tail is constantly created. But again, it is not physically a part of the nucleus of the comet.

Now Starboy has given a link to a press release, where the ion tail was studied as the comet went through the solar current sheet, where the ISM changes sign, and it was shown that the tail was "turned off". This is not surprising, as in the current sheet the magnetic field goes almost to zero, and there cannot be a structured pick up of newly formed ions. You don't need any current systems for this, this just happens. The pickup of ions near the nucleus does not need any EM apart from being an EM phenomenon by itself, the "gluing" of charged particles to magnetic fields. (although I expect you to throw my own research on e.g. Europa in my face, and start talking about the Alfven wings etc. etc. but these are results of pick up of ions)

Quote:
Originally Posted by starboy
And so I understood the Amperian surface, can be taken has the whole surface area of a curly magnetic field being available for help in inducing magnetic field/s, so if you calc of:
Quote: 8 microAmps/m2, and more likely in this model to be 1 nanoAmp/m2.
this I take, was over the entire surface area of a comets coma, corona and tail? And then that power:
Quote: who cares how many kiloWatthours that represents
KiloWatts? maybe MegaWatt-Gigawatt Hrs be focused/pinched in to a small area, it could then be available to do "work"
I do hope you understand that micro-amps/m2 are very very small current densities. Even though you may have a large "Amperian surface" (which I still don't know what it is) with a "curly magnetic field" (whatever that is) you cannot really do much with these kinds of current densities. You need enormous electric fields if you want to create you gigaWatthours of energy just through j.E (I leave it to you to calculate what kind of E-field you need).

As the magnetic field of the ion tail is the solar wind magnetic field, naturally it will interact with the Earth, if our planet happens to go through the tail. However, I have done a little literature search, and did not find any papers on the subject. This probably means that nothing much interesting happens. However, if I am correct, Venus flew through the tail of comet ... (dunno which one) just after VEX arrived. I think we are going to look at those data here in Graz, if anything intersting comes up, you'll hear about it.
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  #329 (permalink)  
Old 05-February-2007, 11:18 AM
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Quote:
Originally Posted by VanderL View Post
I can't give you what is not there, but I can try and falsify the model before any quantitative detail is known. So I don't see the point in speculating about the amount of charge needed, and speculating where it all comes from (we don't have the strength of the radial electric field centered on the Sun yet) without verifying that the premise of an electric comet has past the first test; being viable.

Conversely, one can always argue that predictions (recall Deep Impact where an early flash, no ice, more energy release than predicted by mainstream) do not count as predictions for all kinds of reasons. I would argue that we need to concentrate on the differences that should really distinguish the electric model from all others (the "snowball" model in it's various forms).

Cheers.
I will patiently wait until the EC finds a proponent that can do physics and math and who will come up with some real stuff. In my book you need e.g. a reasonable voltage to do the EDM, which EC proponents seem to like. We will see what comes up, in the mean time I need to work on the Earth's tail (instead of on a cometary tail).
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  #330 (permalink)  
Old 05-February-2007, 02:26 PM
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And from our old mate wiki
Quote:
As late as 2002, there is conflict on how much ice is in a comet. NASA's Deep Space 1 team, working at NASA's Jet Propulsion Lab, obtained high-resolution images of the surface of comet Borrelly. They announced that comet Borrelly exhibits distinct jets, yet has a hot, dry surface. The assumption that comets contain water and other ices led Dr. Laurence Soderblom of the U.S. Geological Survey to say, "The spectrum suggests that the surface is hot and dry. It is surprising that we saw no traces of water ice." However, he goes on to suggest that the ice is probably hidden below the crust as "either the surface has been dried out by solar heating and maturation or perhaps the very dark soot-like material that covers Borrelly's surface masks any trace of surface ice".[23]

The recent Deep Impact probe has also yielded results suggesting that the majority of a comet's water ice is below the surface, and that these resevoirs feed the jets of vaporised water that form the coma of Tempel 1
My bold, WOw-wee so many holes so little time. Your maths and physics is not suggesting (as in, spectrum suggests that the surface is hot and dry) it's yelling in ya face! It is indeed HOT and DRY, but no, maths and physics are "suggesting" it may be hidden, invisible water, just under the surface. Did DI find ice within the crater??

Also

Quote:
In 1996, comets were found to emit X-rays.[3] These X-rays surprised researchers, because their emission by comets had not previously been predicted. The X-rays are thought to be generated by the interaction between comets and the solar wind: when highly charged ions fly through a cometary atmosphere, they collide with cometary atoms and molecules. In these collisions, the ions will capture one or more electrons leading to emission of X-rays and far ultraviolet photons.[4
But shouldn’t the theory predict this? EC theory had.

Double flash?
Collimated—filamentary jets
Microdust?
Extremely dark albedo?

We could go on and on, but that will get us know where. Or you could just go HERE

Plus there is a kick arse electrical storm, so it's time to go!

PS Gillianren, I'll have a crack at that tomorrow.
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