Life on Earth ~ Recycled Stardust
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Posted 5/16/09
When you look outside, you might see a tree, a bird, a squirrel, or even a person. You would probably never guess that those life forms, and all life on earth, even the material the earth itself is made out of was at one point just matter undergoing nuclear fusion in the core of a star.


Stars are a nuclear fusion engine. That is they take one element (hydrogen) and fuse it into another heavier element (helium), Through a process called nuclear fusion.


Nuclear fusion separates stars and brown dwarfs from Jupiter-like objects. Nuclear fusion is the process of light nuclei combining to form heavier nuclei. For elements lighter than iron, this process liberates energy. The fusion of elements heavier than iron takes energy rather than gives energy. Stars are therefore powered by the fusion of elements lighter than iron, particularly of hydrogen.

Recall how an atom is constituted: an atom has a nucleus composed of protons and neutrons, collectively known as nucleons, around which electrons orbit. In nuclear fusion, the total number of protons and neutrons is conserved, but some protons are converted into neutrons in the process. A proton becomes a neutron by emitting a positron, the antiparticle of the electron, and a neutrino in an exothermic process that releases 0.8 MeV of energy.1 A neutron becomes a proton by emitting an electron and a neutrino in an endothermic process.



In the early universe the only elements were Hydrogen and Helium and trace amounts of Lithium, so the first stars weren't born with heavier elements in them like stars are today. So the fusion process in an early star was the Proton-Proton process


The Proton-Proton Process :


And once the star had heavier elements it would use the CNO process (later stars were born with heavier elements already in them)


The Carbon, Nitrogen, Oxygen Process :


So using the the nuclear fusion process of early stars would fuse Hydrogen -----> Helium, but once the Hydrogen supply ran out, the star would fuse the Helium into heavier elements predominantly carbon-12 and oxygen.-16.


Helium Fusion :


Thus the carbon on earth life is made out of was created in the nuclear fusion that once was inside the kernel of a star, which then went supernova and spread that carbon throughout the universe, and that very carbon has become life on earth, and probaly other planets as well, but not only was the carbon for life fused inside a star, all heavier elements up to Iron were fused inside a star, all elements heavier then iron were created in the stars resulting supernova, so all the material planets, the planets atmospheres and everything else(all naturally made elements heavier then helium) is made out if was created through nuclear fusion inside a star or during a supernova.
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Posted 5/16/09
was there a point here or is it just random facts?
Posted 5/16/09
^ I believe this has been posted so they don't have to repeat themself in future during discussions related to origin of life. But also, there is a point that we can discuss the origin of life here too.

I knew the basics of this already, horray science class, but won't be reading this as I'm fully aware it will make my head hurt. I'm terrible with anything chemistry related. Good to have this posted up I suppose, it's quite interesting really.
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Posted 5/16/09

Allhailodin wrote:

When you look outside, you might see a tree, a bird, a squirrel, or even a person. You would probably never guess that those life forms, and all life on earth, even the material the earth itself is made out of was at one point just matter undergoing nuclear fusion in the core of a star.


Stars are a nuclear fusion engine. That is they take one element (hydrogen) and fuse it into another heavier element (helium), Through a process called nuclear fusion.


Nuclear fusion separates stars and brown dwarfs from Jupiter-like objects. Nuclear fusion is the process of light nuclei combining to form heavier nuclei. For elements lighter than iron, this process liberates energy. The fusion of elements heavier than iron takes energy rather than gives energy. Stars are therefore powered by the fusion of elements lighter than iron, particularly of hydrogen.

Recall how an atom is constituted: an atom has a nucleus composed of protons and neutrons, collectively known as nucleons, around which electrons orbit. In nuclear fusion, the total number of protons and neutrons is conserved, but some protons are converted into neutrons in the process. A proton becomes a neutron by emitting a positron, the antiparticle of the electron, and a neutrino in an exothermic process that releases 0.8 MeV of energy.1 A neutron becomes a proton by emitting an electron and a neutrino in an endothermic process.



In the early universe the only elements were Hydrogen and Helium and trace amounts of Lithium, so the first stars weren't born with heavier elements in them like stars are today. So the fusion process in an early star was the Proton-Proton process


The Proton-Proton Process :


And once the star had heavier elements it would use the CNO process (later stars were born with heavier elements already in them)


The Carbon, Nitrogen, Oxygen Process :


So using the the nuclear fusion process of early stars would fuse Hydrogen -----> Helium, but once the Hydrogen supply ran out, the star would fuse the Helium into heavier elements predominantly carbon-12 and oxygen.-16.


Helium Fusion :


Thus the carbon on earth life is made out of was created in the nuclear fusion that once was inside the kernel of a star, which then went supernova and spread that carbon throughout the universe, and that very carbon has become life on earth, and probaly other planets as well, but not only was the carbon for life fused inside a star, all heavier elements up to Iron were fused inside a star, all elements heavier then iron were created in the stars resulting supernova, so all the material planets, the planets atmospheres and everything else(all naturally made elements heavier then helium) is made out if was created through nuclear fusion inside a star or during a supernova.

cerisey wrote:

^ I believe this has been posted so they don't have to repeat themself in future during discussions related to origin of life. But also, there is a point that we can discuss the origin of life here too.

I knew the basics of this already, horray science class, but won't be reading this as I'm fully aware it will make my head hurt. I'm terrible with anything chemistry related. Good to have this posted up I suppose, it's quite interesting really.


I made one for Evolution as well.
That should help expain what it is and nock down the ID miss understandings of what it is.

I love such threads, because I don't need to right out a long winded remark to people who do not understand something. I just point them to this thread, or quote the thread. Its a lot faster.

'Feel free to use my evolution thread the same way.'




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Posted 5/16/09
What are you trying to prove here?
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Posted 5/16/09 , edited 5/16/09

azera wrote:

What are you trying to prove here?
Could it be a thread created so that we explain right of the back how something works, so we don't get 300 more post wen we are debating using false ideals and bull shit. reused bullshit is what most people backed in a corner use over an over again. Now that this thread is here they have no right to act as ignorent and miss use how things works for there own ends, not without us pointing the thread out at least.

Posted 5/16/09 , edited 5/16/09
It's only a matter of time before some religious people start quoting the Bible and "Jesus created the universe" around in this thread.

I wish someone would come up with something new instead of these religious and how the earth was made threads in the Extended Discussion section because now it's just getting old.
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Posted 2/23/10

wrote:

It's only a matter of time before some religious people start quoting the Bible and "Jesus created the universe" around in this thread.

I wish someone would come up with something new instead of these religious and how the earth was made threads in the Extended Discussion section because now it's just getting old.


Earth is old the thread is new compared to that time.

If their is still a debate about the topic then in my opinion the debate has not reached its end yet.. and so it is not old.
Posted 2/26/10
We are dust. So it is that we drift away in the wind.
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Posted 2/28/10 , edited 2/28/10

Thread is going nowhere.

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