a more pertinant question might be what would cause ice to melt in space at all, if it does not meet with the friction of an atmoshere or collide with an object travelling at speed?
i dont claim to be an expert on the subject, and the above might be better explained by someone with more up to date knowledge on the subject
ice doesnt melt in space .. it either super heats or super freezes .. which is for all intents and purposes the same thing.
and i do not claim to be an expert either .. but i now know some people who are .. thanks for the advice .. atleast now someone is making an effort.
Can you explain how super heating is the same as super freezing? What has 'super freezing' got to do with melting?
super freezing and heating have virtually the same effect slim gasation i.e. sublimation.
basic school boy physics slim thought you may have knew that.
If it's basic school boy physics, why don't you explain to me how ice sublimates in space due to low temperatures like I asked? If ice sublimates at both high and low temperatures, are you saying there is no ice in space?
Why is it more pertinent to ask what would cause ice to melt in space? What are you trying to say?
if you wanbt to know slim research it yourself as i have .. i will decide what and when i post thanks.
Why would you need to research basic schoolboy physics manxman2?
Do you know what this is?
Do you know why a comet only has a tail when it gets near the sun?
Do you know you're talking out of your hoop?
i know fullwell slim .. your determined to split hairs on anything.
see slim no liquid water in space .. all water molecules are either ice or vapour.
Design Reference Mission Case Study Stratospheric Observatory for Infrared Astronomy Science Steering Committee.
SOFIA and the Formation of Water in the Cold Interstellar Medium
Fig. 1 shows a schematic of the oxygen chemistry that is believed to power water
formation in interstellar space. Chemical models (see Elitzur & de Jong 1978, Neufeld et al.
1995) show that for T >300 K, water vapor will account for most of the gas-phase oxygen
that is not bound as CO, as a result of the neutral-neutral reactions: H2 + O ! OH +
H and H2 + OH ! H2O + H. At temperatures less than 300 K, however, these reactions
are negligibly slow because they possess significant activation energy barriers. Gas-phase
water is then produced either by means of reactions of atomic oxygen with hydrogen on
grain surfaces with subsequent sublimation or via cosmic-ray driven ion-neutral chemistry,
as shown in Fig. 1. Water formed on grains will remain frozen on the grain until either the
grain temperature exceeds 110 K or the water molecule is photodesorbed by a UV photon.
SWAS and Odin observations have determined that the water vapor abundance in cold
gas is several orders of magnitude below theoretical expectations (see, e.g. Bergin et al.
2001). The primary solution provided as an answer to this question is that the formation of
water ice on grains results in a depletion of atomic oxygen from the gas. In this model the
fuel for the chemistry, oxygen atoms, is frozen onto grains in the form of water ice. This ice
will not evaporate unless temperatures exceed 110 K (Fraser et al. 2001) and hence most
oxygen is essentially unavailable to make water vapor or molecular oxygen in the gas. Thus
the low abundance of water vapor hints at a lack of gaseous atomic oxygen in the densest
regions of molecular cloud cores. Even a little amount of oxygen in the gas would create
water vapor that could be detected by SWAS and ODIN.
Herschel has a key program that focuses exclusively on water, Water in Star-Forming
Regions with Herschel (WISH; PI: E. van Dishoeck). This program will survey the spectrum
of activity in both low and high mass star forming regions. With access to multiple transi-
tions of both ortho and para forms of water, and higher angular resolution than SWAS/Odin,
Herschel will determine accurate water vapor abundances and thereby challenge these theo-
full evaluation here.
"The surface is about 5 percent ice, and the rest is just dark dirt. So it's like a very dirty skating rink."
why not try sourcing your data slim.
I didn't say there was liquid in space. I'm questioning your statement regarding super freezing: "ice doesnt melt in space .. it either super heats or super freezes .. which is for all intents and purposes the same thing."
Why not try understanding the question manxman2, why doesn't the ice on the comet sublimate, if freezing and heating have the same effect? Why is it that the ice stays ice when it's further from the suns radiation but when it nears the sun, the ice turns into vapor forming the tail? Heating and cooling: not the same thing. The opposite in fact, a fairly basic principle of physics!
slim what part of i will post what i like when i like did you not understand ..??
lmao as slim realises the fundermental basis of his shuttle footage arguement is disintergrating in front of him lol.
hard for non existant ice crystals to go out of focus isnt it slim. debunkers have been falsely peddling that shit for years .. like i have said first we will eliminate what the footage doesnt show .. then speculate as to what it does depict.
i dont know who you think you are slim demanding answers .. ive told you do your research or i will fuuk you in the arse.
The opposite in fact, a fairly basic principle of physics. i am going to use that line to whip you with whipping boy .. your a joke.
your just repeating questions already answered on previous page .. and i am not supplying the other link to the virtually the same thing quote until i put up the shuttle footage thread then you can read it. .. until then do your own research .. and for the record i dont give a flying fuuk about comets and your efforts to diversify the discussion.
and if you think comet ice is chemically identical to shuttle ice then feel free to prove it.
i will bet you cannot..
chubby brown wrote a great song for you slim m8 .. it was called the back scuttle.
and heres another big numbers throw away line from the same world renowned physicist .. you have more chance of entering and winning every lottery in the would on the same weekend as you have of seeing a singular ice crystal in space.
Do you know why a comet only has a tail when it gets near the sun?
Do you know you're talking out of your hoop?
what was this bullshit about if you acknowledge now after having it pointed out too you that there is no liquid water in space..
how do you know ice doesnt vapourise/sublimate from a comet in deep space when super freezing anyway ..?? .. link to anything relevent to your unconfirmed/guess/assertion please .. again i will wager you cannot. .. ice does sublimate in deep space .. it just does it much more slowly..
try sticking your fingers onto some dry ice slim .. you will get them burned worse than here.
comets are also depleted by sublimation each time they come near the Sun. Ultimately, old comets may break into several pieces or even completely disintegrate. In some cases, the comet may have a solid rocky core that is then left to travel around the comet's orbit as a dark barren asteroid.
You think there's no ice in space? Read up on the Kupier Belt for example, and come back with that statement again.
I'm asking you questions to back up what your saying, that's all. Why are you getting so upset about it?
I've never claimed there was liquid water in space. What I'm questioning is your understanding of what happens to ice in a vaccum at both high and low temperatures. You said it was the same thing, and it isn't. You're wrong, sorry.
Because it's tail dissapears. It's explained in very simple language here: http://www.windows.ucar.edu/tour/link=/com...ublimation.html
Right, well done, the suns radiation causes the ice to sublimate. The temperature rises. This doesn't happen when its away from the sun, because what happens to the comet when it's hot is different from what happens when it's cold.
A comets tail disappears you say .. more incorrect assumption slim.
A comets tail does not disappear it mre becomes invisible in our norml light spectrum .. its has a clear tail in the infra red spectrum .. as it sublimates/vaporises its various components no matter what the temperature depending on how old the comet is and how well insulted the various materials are.
A comet like halle bop has an estimated 2000 star passes before extinction or if it has a solid rock core becomes an asteroid.
The diagram you posted above clearly shows your intent on showing the different transitional stages of a water molecule in space .. that was before i made it abundantly clear to you that water in space only exists in solid or gaseous form.
Keep digging your own verbal grave .. twisting other peoples words or plain fabricating them to look and sound the part .. i will just keep posting solid indisputable fact and links to that fact ..you will notice the links were from pretty indisputable sources so keep guessing slim and i will just keep shooting your guesses down with true facts not guestimates .. everything i put here is linkable to its source.
That's simply incorrect. I'm talking about the tail formed from the sublimation effect you raised as the comet gets close to the sun, that dissapears when it goes away from the sun. This is because it's the suns radiation that causes the sublimation that creates the tail. I'm using that example to demonstrate that sublimation of a solid (the ice of the comet) to a gas (the tail) only happens when it's heated, not cooled. How is anything that's visible in the infra red spectrum applicable to a discussion about ice sublimation? Does the vapour suddenly become invisible only in infra red at certain temperatures?
Thats exactly what we were talking about slim. .. we all know what happens to a comet passing a heat source.
However you didn’t know that a comet sublimates its components from the second its created until it dies.
Feel free to prove me wrong ive had enough of you demanding i prove you unfounded garbage incorrect .. you wont ofcourse because if you could emphatically show it you would..
Until then its take slims unfounded word on it eh.
Yes, passes. It gets smaller as it passes a heat source. It doesn't get smaller out in deeper space away from the star. That's the point I'm trying to get you to understand, the effect of heating and cooling on ice in a vacuum isn't the same, as demonstrated by a comet.
Just a rehash repeated Q. Slim its no good you guessing .. read the sofia report and shut the fuckup about something you know sweet f.a. about in any detail.
Where's your linkable source that says heating and cooling have the same effect on ice in space?
The data is available from many sources im not your lacky slim .. you either look or wait until i am finished compiling my thread opener.
Your video didn't have a singular object, it had hundreds. What's the relevance of the quote?
If you cannot see the relevance of the throw away quote then i am not leading you to water
You will however re-alise too late at a later point in time.
Ice warms up when you take it from the freezer you nut job. Does ice steam when you put it from the warm into the freezer? No!
Well done for quoting the obvious .. and a sealed freezer has a drain on it just for cosmetic value i suppose. .. anyway it was an example of water going from stage 1 directly to stage 3 bypassing the liquid phase but thats too complicated i suppose.