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"When the ice melted on Wild 2, the resulting warm water dissolved minerals that were present at the time and precipitated the iron and copper sulfide minerals we observed in our study,”
The sulfide minerals formed between 50 and 200 degrees Celsius [122 and 392 degrees Fahrenheit], much warmer than the sub-zero temperatures predicted for the interior of a comet."
No, this is not something anyone "knew" at any time but something a lot of people have speculated about. What we "know" is that comets are almost completely devoid of water in any form. There is much evidence from previous missions to several comets that have shown that water is not easy to find and on some comets is totally absent.
You're point is that water exist in any form on comets such as water in the form of Ice( We've already known that for a long time as you pointed out )
Stop to think here for a minute. Could it be possible that these sulfide materials formed somewhere before the comet itself formed? Does this evidence prove that comets currently have water on them or is it simply proof that water was present when these sulfides formed? I'm just saying that the current accepted definition of comets as dirty snowballs that originated in the outer solar system is completely wrong so this a priori of water forming these sulfides on comets might also be incorrect.
When the ice melted on Wild 2, the resulting warm water dissolved minerals that were present at the time and precipitated the iron and copper sulfide minerals we observed in our study,” Lauretta said. “The sulfide minerals formed between 50 and 200 degrees Celsius [122 and 392 degrees Fahrenheit], much warmer than the sub-zero temperatures predicted for the interior of a comet.
Oh and by the way, I'm all for the Pamspermia theory. I think it is very possible that comets and asteroids can harbor micro-biological life and deliver them from their source through space to Earth. Keep in mind that at one time, not long ago, this theory was though to be absurd by the scientific community.
I am not the least bit angry. I do however find your ridicule annoying. I actually find this thread interesting. I did spend quit some time reading about comets over the past few years.
So you become angry because i bring forward evidence
Care to prove the Oort cloud as fact? Or didn't you know that this is still just a theory?
I see you ignore the fact the Oort cloud composes of mostly icy bodies
en.wikipedia.org...
The Oort cloud is a hypothesized spherical cloud of comets which may lie roughly 50,000 AU,
I am not ignoring these observations, I am complimenting them. You might want to take the time to look over some of the links I previously posted. The videos I linked from mnemeth are particularly relevant in this case.
and the fact that when observing several comets through spectrometer analysis we can see water via sublimation dissipating from said comets.
I would love to look over this evidence but it seems to not be available. Care to help me out here? I know your original article and this post is about this supposed evidence but I still remain skeptical. Care to address my earlier question regarding this evidence?
There is much evidence that proves water is present in a form ice/water
So tell me, where did the "snowball" theory originate from? Care to show any evidence supporting this theory? The reason spectrometers are showing signs of HO does not mean there is water on these observed comets. I am not making the claim that water does not exist on comets, the evidence collected by NSA, JPL, ESA and others is showing that. I am merely pointing it out.
So to go and say the Snowball theory is bunk is to be ignorant at the least.
That comment is just plain odd. I don't take science religiously nor do I go on zealot crusades. I find this a bit insulting though.
you refuse to believe it because of some sort of religious zealot crusade against dirty snowball theory.
The study also reinforces the fact that comets are active, changeable bodies — and that each one is likely different.
If analyses of comets are representative of the whole, the vast majority of Oort-cloud objects consist of various ices such as water, methane, ethane, carbon monoxide and hydrogen cyanide.[18] However, the discovery of the object 1996 PW, an asteroid in an orbit more typical of a long-period comet, suggests that the cloud may also be home to rocky objects.[19] Analysis of the carbon and nitrogen isotope ratios in both the Oort cloud and Jupiter-family comets shows little difference between the two, despite their vastly separate regions of origin. This suggests that both originated from the original protosolar cloud,[20] a conclusion also supported by studies of granular size in Oort cloud comets[21] and by the recent impact study of Jupiter-family comet Tempel 1.[22]