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Ouzo Dan Behind you 07 Dec 17 11.59pm | |
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Originally posted by chateauferret
This is actually true for all elements heavier than nitrogen, and in fact all elements heavier than iron can only be produced in the explosion itself. Main sequence stars produce energy by fusing hydrogen into helium and by doing so the radiative pressure they create keeps the outer layers of the star "up" and stop it from collapsing under its own mass. When a star runs out of hydrogen it fuses the helium into carbon. When the helium runs out it fuses carbon into neon. Trouble is the heavier the fuel is the more s*** it is at producing energy because being heavier it requires more energy to shove the atoms together and fuse them. When the neon is all fused into oxygen it uses oxygen and makes silicon. Then it fuses silicon into iron. Iron is the lightest element which requires more energy to fuse than can be obtained from the fusion so once it starts fusing iron it can't keep the outer layers from collapsing any more. They fall in and the shockwave blows the outer layers away, distributing the heavier elements in the outer layers of the star across space. The explosion also rams atoms together at high energies and allows loose neutrons to be captured and that makes the elements heavier than iron, including gold, lead, silver, and up to uranium. Eventually those atoms become part of interstellar clouds which condense to form new star systems, and some of them will turn up on its planets. Being heavy, much of the material will fall to the centre of a new planet (the Earth's core is substantially iron). As well as providing us with many raw materials that are only manufactured in supernovae and their progenitors therefore supernovae also provide us with an iron core which is responsible for generating the Earth's magnetic field and without which radiation would reach the surface of the Earth and make it uninhabitable for complex forms of life. Without supernovae therefore there would be no football.
As a favourite astrophysicist of mine once said "were all made of star stuff". I've lost my way with Astronomy over the past couple years, hopefully things are changing for the better so i can treat myself to a new reflector. Edited by Ouzo Dan (08 Dec 2017 12.00am)
The mountains are calling & I must go. |
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stuckinbristol In the woodwork. 08 Dec 17 9.15am | |
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Betelgeuse remains our best hope at seeing a supernova up close & if it does go bang it wont disrupt the earths orbit, we will however have two suns in the sky for about 3 to 4 weeks. So will it be raining gold a couple of weeks/months/years after this?
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mr. apollo Somewhere in Switzerland 08 Dec 17 10.00am | |
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Space is big. Really big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist, but that's just peanuts to space.
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Andy_G Wimbledon 08 Dec 17 10.31am | |
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I am right with If the history of the earth was a book the size of the bible, man would only appear on the last page?
The ups and downs of Palace have left me older than my years |
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Andy_G Wimbledon 08 Dec 17 10.32am | |
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Originally posted by chateauferret
This is actually true for all elements heavier than nitrogen, and in fact all elements heavier than iron can only be produced in the explosion itself. Main sequence stars produce energy by fusing hydrogen into helium and by doing so the radiative pressure they create keeps the outer layers of the star "up" and stop it from collapsing under its own mass. When a star runs out of hydrogen it fuses the helium into carbon. When the helium runs out it fuses carbon into neon. Trouble is the heavier the fuel is the more s*** it is at producing energy because being heavier it requires more energy to shove the atoms together and fuse them. When the neon is all fused into oxygen it uses oxygen and makes silicon. Then it fuses silicon into iron. Iron is the lightest element which requires more energy to fuse than can be obtained from the fusion so once it starts fusing iron it can't keep the outer layers from collapsing any more. They fall in and the shockwave blows the outer layers away, distributing the heavier elements in the outer layers of the star across space. The explosion also rams atoms together at high energies and allows loose neutrons to be captured and that makes the elements heavier than iron, including gold, lead, silver, and up to uranium. Eventually those atoms become part of interstellar clouds which condense to form new star systems, and some of them will turn up on its planets. Being heavy, much of the material will fall to the centre of a new planet (the Earth's core is substantially iron). As well as providing us with many raw materials that are only manufactured in supernovae and their progenitors therefore supernovae also provide us with an iron core which is responsible for generating the Earth's magnetic field and without which radiation would reach the surface of the Earth and make it uninhabitable for complex forms of life. Without supernovae therefore there would be no football.
That my friend is free education.
The ups and downs of Palace have left me older than my years |
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nickgusset Shizzlehurst 08 Dec 17 10.34am | |
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Originally posted by mr. apollo
Space is big. Really big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist, but that's just peanuts to space. Attachment: ford-and-arthur.jpg (36.84Kb)
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jamiemartin721 Reading 08 Dec 17 10.42am | |
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Originally posted by Andy_G
I am right with If the history of the earth was a book the size of the bible, man would only appear on the last page? Probably as a footnote, to the last page. Unless it was a book, written by humans, because humans invented the power of boobs.
"One Nation Under God, has turned into One Nation Under the Influence of One Drug" |
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Ouzo Dan Behind you 08 Dec 17 11.04am | |
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Originally posted by stuckinbristol
Betelgeuse remains our best hope at seeing a supernova up close & if it does go bang it wont disrupt the earths orbit, we will however have two suns in the sky for about 3 to 4 weeks. So will it be raining gold a couple of weeks/months/years after this? Some of it may we'll find it's way to earth It's the beauty of E=MC2
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collier row eagle romford essex via another galaxy 08 Dec 17 11.24am | |
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I saw thousands of stars on my journey here from Neptune.
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Southampton_Eagle At the after party 08 Dec 17 12.24pm | |
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Good band, their first album 'Spiders' was immense.
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Park Road 08 Dec 17 1.09pm | |
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Space is ample
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stuckinbristol In the woodwork. 08 Dec 17 1.15pm | |
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Time to invent that heavy duty umbrella then. Make a hell of a family story mind.... That's a really nice gold ring you have. Yes, it was made out of a piece of gold that fell from the heavens and hit granddad on the head, killing him instantly.
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