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| Started by | Sam Wormley <swormley1@gmail.com> |
|---|---|
| First post | 2015-10-23 09:56 -0500 |
| Last post | 2015-10-23 14:22 -0700 |
| Articles | 3 — 3 participants |
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Average chemical composition of the universe to be the same as that of the sun Sam Wormley <swormley1@gmail.com> - 2015-10-23 09:56 -0500
Re: Average chemical composition of the universe to be the same as that of the sun jimp@specsol.spam.sux.com - 2015-10-23 18:16 +0000
Re: Average chemical composition of the universe to be the same as that of the sun "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-10-23 14:22 -0700
| From | Sam Wormley <swormley1@gmail.com> |
|---|---|
| Date | 2015-10-23 09:56 -0500 |
| Subject | Average chemical composition of the universe to be the same as that of the sun |
| Message-ID | <-radnasZmdQE17fLnZ2dnUU7-fkAAAAA@giganews.com> |
Average chemical composition of the universe to be the same as that of the sun > http://phys.org/news/2015-10-average-chemical-composition-universe-sun.html > All of the chemical elements that are heavier than carbon, the oxygen > we breathe, the silicon that makes up the sand on the beach, were > produced inside stars through nuclear fusion and released by stellar > explosions called supernovae. By measuring the chemical composition > of the Universe, scientists are trying to reconstruct the history of > how, when, and where each of the chemical elements so necessary for > the evolution of life were produced. > > Very generally speaking, there are two ways that a supernova > explosion can take place, and the proportion of chemical elements > that are produced depend on the supernova type. Lighter elements, > like oxygen and magnesium, originate mainly from the explosions of > very massive stars, more than 10 times the size of our Sun, at the > end of their lifetimes. These are known as "core-collapse > supernovae". Smaller stars instead usually end their life cycles as > "white dwarves", a small fraction of which can explode as a > "thermonuclear" or "type Ia" supernova if they later accrete matter > from a companion star, causing the white dwarf to become unstable to > the pull of its own gravity. Heavier atoms like iron and nickel > mostly come from this latter type of supernovae. To make up the > chemical composition of our Solar System, for instance, we require a > mixture of roughly one thermonuclear for every five core-collapse > supernova explosions. JAXA research fellow Aurora Simionescu wanted > to find out whether the average chemical composition of the Universe > was similar to that of our Solar System, or whether our local > neighborhood was, after all, a special place. -- sci.physics is an unmoderated newsgroup dedicated to the discussion of physics, news from the physics community, and physics-related social issues.
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| From | jimp@specsol.spam.sux.com |
|---|---|
| Date | 2015-10-23 18:16 +0000 |
| Message-ID | <j4aqfc-da1.ln1@mail.specsol.com> |
| In reply to | #527647 |
Sam Wormley <swormley1@gmail.com> wrote: > Average chemical composition of the universe to be the same as that of > the sun Whoopde fucking do; is this surprising shit head? Have you ever wondered what your life might have been like if you had the competence to do more than just copy the words of others, spamming piece of shit? -- Jim Pennino
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| From | "reber g=emc^2" <herbertglazier0@gmail.com> |
|---|---|
| Date | 2015-10-23 14:22 -0700 |
| Message-ID | <612008ac-81a6-4204-ba1b-0b288ef0a09c@googlegroups.com> |
| In reply to | #527647 |
On Friday, October 23, 2015 at 7:56:30 AM UTC-7, Sam Wormley wrote: > Average chemical composition of the universe to be the same as that of > the sun > > http://phys.org/news/2015-10-average-chemical-composition-universe-sun.html > > > All of the chemical elements that are heavier than carbon, the oxygen > > we breathe, the silicon that makes up the sand on the beach, were > > produced inside stars through nuclear fusion and released by stellar > > explosions called supernovae. By measuring the chemical composition > > of the Universe, scientists are trying to reconstruct the history of > > how, when, and where each of the chemical elements so necessary for > > the evolution of life were produced. > > > > Very generally speaking, there are two ways that a supernova > > explosion can take place, and the proportion of chemical elements > > that are produced depend on the supernova type. Lighter elements, > > like oxygen and magnesium, originate mainly from the explosions of > > very massive stars, more than 10 times the size of our Sun, at the > > end of their lifetimes. These are known as "core-collapse > > supernovae". Smaller stars instead usually end their life cycles as > > "white dwarves", a small fraction of which can explode as a > > "thermonuclear" or "type Ia" supernova if they later accrete matter > > from a companion star, causing the white dwarf to become unstable to > > the pull of its own gravity. Heavier atoms like iron and nickel > > mostly come from this latter type of supernovae. To make up the > > chemical composition of our Solar System, for instance, we require a > > mixture of roughly one thermonuclear for every five core-collapse > > supernova explosions. JAXA research fellow Aurora Simionescu wanted > > to find out whether the average chemical composition of the Universe > > was similar to that of our Solar System, or whether our local > > neighborhood was, after all, a special place. > > > -- > > sci.physics is an unmoderated newsgroup dedicated > to the discussion of physics, news from the physics > community, and physics-related social issues. Its implosion that produces heavy elements.Think good science.TreBert
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