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Comets
If comets are made from mostly water-ice, some dirt and organic matter they
had to come from a former water planet that blew up somewhere in the universe. The planet apparently had water and life before it's demise. This seems to be the natural way the universe seeds it's livable planets and spreads it's life. There must be lots of Ort clouds and Keifer belts in other solar systems and other galaxies. -- America's problem? The plates are too big! Throw out your dinner plates and get smaller ones! More is NOT better. 20oz soda is TOO big, get an 8 ounce glasses, bottles and cans . The fat must come off or you die a sickly decrepit death. |
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Comets
Nog wrote:
If comets are made from mostly water-ice, some dirt and organic matter they had to come from a former water planet that blew up somewhere in the universe. Why? What says that organic matter can only be produced on a planet? (IIRC, while "life" implies organic matter, organic matter does not have to have come from "life" yes?) rick jones -- No need to believe in either side, or any side. There is no cause. There's only yourself. The belief is in your own precision. - Jobert these opinions are mine, all mine; HP might not want them anyway... feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH... |
#3
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Comets
In article 6f7gf.1658$8o6.827@trndny03, "Nog"
wrote: If comets are made from mostly water-ice, some dirt and organic matter they had to come from a former water planet that blew up somewhere in the universe. Er... why? Where do you imagine this water planet came from? Why do you imagine comets couldn't form in the same way? Finally, what could possibly "blow up" a water planet and leave fragments of it whizzing around our solar system? ,------------------------------------------------------------------. | Joseph J. Strout Check out the Mac Web Directory: | | http://www.macwebdir.com | `------------------------------------------------------------------' |
#4
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Comets
Nog wrote: If comets are made from mostly water-ice, some dirt and organic matter they had to come from a former water planet that blew up somewhere in the universe. Er, no. Stars are made of hydrogen, so when they go super nova, they scatter a lot of hydrogen. Further, larger stars makes a lot of oxygen (see C-N-O cycle fusion) so when bigger stars go super nova, they scatter a lot of water. That's where the water in comets (and on Earth) comes from: stellar nucleosynthesis. The same also applies to carbon and nitrogen - they're generated in stars. Comets - with water, organics, and rock dust - needn't come from planets at all. Mike Miller |
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Comets
Nog wrote:
If comets are made from mostly water-ice, ... they had to come from a former water planet Then where did the first water planet come from? The fact is, comets do not come from former water planets. They come from interstellar gas, which comes from stars. Stars like our own sun will eventually create all kinds of atoms, and eventually spread many of those atoms out into the cosmos. Some of those atoms may find their way into new stars, new planets, and new comets. A small number of the atoms in our Earth will also make their way into the greater cosmos (Earth loses tons of atmosphere every day) - but what Earth contributes back is a tiny tiny percentage of what the sun creates. So, the Oxygen atoms in a comet definitely come from a star. They may have even passed through a second star. They were never part of a planet. Sorry. |
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Comets
In article 6f7gf.1658$8o6.827@trndny03, Nog wrote:
If comets are made from mostly water-ice, some dirt and organic matter they had to come from a former water planet that blew up somewhere in the universe. Not necessarily. In the dust cloud around a forming star, there would be lots of water molecules, ammonia molecules, "dirt" molecules, and a fair number of organic molecules. Cold temperatures would cause things to be mostly in the form of ice, but even then, there would be enough energy for higher organic molecules than methane and benzene to form, given enough time. The planet apparently had water and life before it's demise. This seems to be the natural way the universe seeds it's livable planets and spreads it's life. There must be lots of Ort clouds and Keifer belts in other solar systems and other galaxies. As I said before, this does not have to come from the decomposition of a planet. There probably are a lot of Oort clouds and Kuiper belts, especially about stars which are not part of a multiple system. -- This address is for information only. I do not claim that these views are those of the Statistics Department or of Purdue University. Herman Rubin, Department of Statistics, Purdue University Phone: (765)494-6054 FAX: (765)494-0558 |
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Comets
-- America's problem? The plates are too big! Throw out your dinner plates and get smaller ones! More is NOT better. 20oz soda is TOO big, get an 8 ounce glasses, bottles and cans . The fat must come off or you die a sickly decrepit death. "Joe Strout" wrote in message ... In article 6f7gf.1658$8o6.827@trndny03, "Nog" wrote: If comets are made from mostly water-ice, some dirt and organic matter they had to come from a former water planet that blew up somewhere in the universe. Er... why? Where do you imagine this water planet came from? Why do you imagine comets couldn't form in the same way? Finally, what could possibly "blow up" a water planet and leave fragments of it whizzing around our solar system? ,------------------------------------------------------------------. | Joseph J. Strout Check out the Mac Web Directory: | | http://www.macwebdir.com | `------------------------------------------------------------------' Water planets come from solar systems. An exploding star would shatter many planets in it's system. Organics don't form in a vacuum. You need a planet with atmosphere. |
#8
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Comets
wrote in message oups.com... Nog wrote: If comets are made from mostly water-ice, some dirt and organic matter they had to come from a former water planet that blew up somewhere in the universe. Er, no. Stars are made of hydrogen, so when they go super nova, they scatter a lot of hydrogen. Further, larger stars makes a lot of oxygen (see C-N-O cycle fusion) so when bigger stars go super nova, they scatter a lot of water. That's where the water in comets (and on Earth) comes from: stellar nucleosynthesis. The same also applies to carbon and nitrogen - they're generated in stars. Comets - with water, organics, and rock dust - needn't come from planets at all. Mike Miller They must come from planets. Organics don't form in total vacuums. You need a planet with an atmosphere to develop life. Then an exploding star can shatter all the inner planets where water planets form. Scientists hate new theories, don't they. |
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Comets
Nog wrote: Water planets come from solar systems. An exploding star would shatter many planets in it's system. When a star goes "bang," a lot of complicated nuclear reactions happen in its core. These nuclear reactions produce things like carbon, oxygen, nitrogen, which react with existing elements like hydrogen. No planets need be involved. If you want to dispute this, take a moment to google "stellar nucleosynthesis" before posting anything. Organics don't form in a vacuum. Absolutely false. Carbon, hydrogen, and other elements don't give a wet fart about where they are when they encounter each other. Stars produce those elements in great quantities. No planets are needed. Mike Miller |
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