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Originally Posted by alatar
But they are balls of ice (and stuff). The results of Deep Impact showed that these dirty snow balls are made up of frozen water with bits of dust throughout. I don't think that comets are planetoid like Pluto or even Earth in nature, i.e. no iron core. |
"And stuff". I took a look at the website. The images realize three "ice rich" areas on Tempel 1: they look like three little dots on its surface. That is not "made of ice" in any reasonable person's view. But NASA is part of the scientific establishment, and it wouldn't surprise me if their interpretation is skewed toward what they hope to find.
Speaking of which:
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The presence of the observed mix of materials requires efficient methods of heating the glassy materials and cooling them to crystalline material and mixing high temperature with low temperature materials over large distances in the early protosolar nebula. The evolution of the protosolar nebula was more complex than a simple homogenous gas and dusty disk heated solely by the temperature of the sun.
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In other words, the observers have to admit that something caused intense heating and cooling in quick succession, and that the heat of the sun can't by itself explain it. They also can't give up on their uniformitarian (early protosolar nebula) paradigm. Electrical phenomena fit the observation of intense heat followed by quick cooling.
The best test of a paradigm and theory is if it has predictive power. Too often, modern physicists are surprised by what they find in space. Those who have been developing the paradigm of an "electric universe", are not surprised by what they find; instead, what's being found is precisely what they expect. That goes a long way with me.