4 ms·

I don't know what you are reading but the sun is absolutely not a stellar remnant. It really should not have much iron in it as it is still happily fusing hydro

I don't know what you are reading but the sun is absolutely not a stellar remnant. It really should not have much iron in it as it is still happily fusing hydrogen. Stars don't create iron until they run out of hydrogen. EDIT: After googling I found an article about this crank Dr. Oliver Manuel. I hope you aren't getting ideas from him. https://www.huffpost.com/entry/epa-heartland-institute_n_59f3486be4b07fdc5fbdc13a https://www.huffpost.com/entry/epa-heartland-institute_n_59f...

djmips 4y ago
Does seem pretty whacky. But I'm quite ignorant in this area - it is interesting that all the heavy elements in the earth we are told come from a super novae. What is the traditional theory for how the planets of our solar system, orbiting around a hypothesized second generation star came to be endowed with those elements? The idea that we are literally formed directly from the remnants of a supernovae is alluring even if I have no formal training in the field.
- HyperSane 4y ago
  "it is interesting that all the heavy elements in the earth we are told come from a super novae" The origin of heavy elements is actually more complex than that. All of the hydrogen and most of the helium in the universe emerged 13.8 billion years ago from the Big Bang. The remainder of the chemical elements, except for a tiny amount of lithium, were forged in stellar interiors, supernova explosions, and neutron-star mergers. Elements up to and including iron are made in the hot cores of short-lived massive stars. There, nuclear fusion creates ever-heavier elements as it powers the star and causes it to shine. Elements heavier than iron—the majority of the periodic table—are primarily made in environments with free-neutron densities in excess of a million particles per cubic centimeter. The free neutrons, if captured onto a seed nucleus, result in a heavier, radioactive nucleus that subsequently decays into a stable heavy species. The so-called slow neutron-capture process, or s-process, mostly occurs during the late stages in the evolution of stars of 1–10 solar masses (M⊙). But the s-process accounts for the formation of only about half of the isotopes beyond iron. Creating the other half requires a rapid capture sequence, the r-process, and a density of greater than 1020 neutrons/cm3 that can bombard seed nuclei. The requisite neutron fluxes can be provided by supernova explosions (see the article by John Cowan and Friedrich-Karl Thielemann, Physics Today, October 2004, page 47) or by the mergers of binary neutron-star systems.
somat 4y ago
Jupiter has an iron core, Mars has an iron core, Earth has an iron core, Venus has an iron core, Mercury has an iron core. and you are telling me that despite the solar system being formed out of the same gas cloud there is no iron core in the sun. I agree that it could not be too large or fusion would suffer, but at this point I am convinced there is one. The stellar remnant theory, is a bit stupid, but fun science fiction, the solar system is a second generation star system, the presence of iron and heavy metals confirms that. The question then is what happened to the core of whatever star exploded to make the gas cloud that formed the solar system. why would it not form the gravitational center of a new star? This is unlikely because I think that fusion, if any, would be noticeably weird. I did find some papers by Dr. Oliver Manuel, I agree, a crank, however there are some interesting questions raised.

djmips 4y ago

Does seem pretty whacky. But I'm quite ignorant in this area - it is interesting that all the heavy elements in the earth we are told come from a super novae. What is the traditional theory for how the planets of our solar system, orbiting around a hypothesized second generation star came to be endowed with those elements? The idea that we are literally formed directly from the remnants of a supernovae is alluring even if I have no formal training in the field.

HyperSane 4y ago
"it is interesting that all the heavy elements in the earth we are told come from a super novae" The origin of heavy elements is actually more complex than that. All of the hydrogen and most of the helium in the universe emerged 13.8 billion years ago from the Big Bang. The remainder of the chemical elements, except for a tiny amount of lithium, were forged in stellar interiors, supernova explosions, and neutron-star mergers. Elements up to and including iron are made in the hot cores of short-lived massive stars. There, nuclear fusion creates ever-heavier elements as it powers the star and causes it to shine. Elements heavier than iron—the majority of the periodic table—are primarily made in environments with free-neutron densities in excess of a million particles per cubic centimeter. The free neutrons, if captured onto a seed nucleus, result in a heavier, radioactive nucleus that subsequently decays into a stable heavy species. The so-called slow neutron-capture process, or s-process, mostly occurs during the late stages in the evolution of stars of 1–10 solar masses (M⊙). But the s-process accounts for the formation of only about half of the isotopes beyond iron. Creating the other half requires a rapid capture sequence, the r-process, and a density of greater than 1020 neutrons/cm3 that can bombard seed nuclei. The requisite neutron fluxes can be provided by supernova explosions (see the article by John Cowan and Friedrich-Karl Thielemann, Physics Today, October 2004, page 47) or by the mergers of binary neutron-star systems.

somat 4y ago

Jupiter has an iron core, Mars has an iron core, Earth has an iron core, Venus has an iron core, Mercury has an iron core. and you are telling me that despite the solar system being formed out of the same gas cloud there is no iron core in the sun. I agree that it could not be too large or fusion would suffer, but at this point I am convinced there is one. The stellar remnant theory, is a bit stupid, but fun science fiction, the solar system is a second generation star system, the presence of iron and heavy metals confirms that. The question then is what happened to the core of whatever star exploded to make the gas cloud that formed the solar system. why would it not form the gravitational center of a new star? This is unlikely because I think that fusion, if any, would be noticeably weird. I did find some papers by Dr. Oliver Manuel, I agree, a crank, however there are some interesting questions raised.