Creation of elements heavier than iron

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Discussion Overview

The discussion centers around the formation of elements heavier than iron, particularly in the context of stellar processes and supernovae. It explores the mechanisms by which these heavier elements are created, touching on concepts from astrophysics and cosmology.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions how heavier elements are formed given that stellar fusion of iron requires more energy than it produces.
  • Another participant suggests that supernovae provide the necessary conditions for the formation of heavier elements due to the extreme energy available during such events.
  • A later reply expresses a personal interest in the topic, mentioning the importance of conveying this information to younger audiences in an educational setting.
  • Further contributions highlight that the majority of protons and neutrons in the human body originated from the Big Bang, while lighter elements were produced by early stars, and heavier elements were synthesized in supernovae.

Areas of Agreement / Disagreement

Participants appear to agree on the role of supernovae in the creation of heavier elements, but the initial question regarding the energy dynamics of stellar fusion remains open for further exploration.

Contextual Notes

Some assumptions about stellar processes and the specifics of nuclear reactions are not fully explored, and the discussion does not resolve the complexities of energy requirements in stellar fusion versus supernova nucleosynthesis.

Who May Find This Useful

Individuals interested in astrophysics, cosmology, and the origins of elements in the universe may find this discussion informative.

doccojohn
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Sorry if this question is too elementary (no pun intended) for this forum.

If stellar fusion of iron takes more energy than it produces, how are heaver elements formed?

Cheers,

JP
 
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In supernovae - if you have an entire star crashing in on your head you can afford a bit of extra energy for a non-equilibrium reaction
 
Thanks! That was my guess but my astrophysics knowledge is clearly rudimentary.

I'm doing volunteer work as a docent in the local planetarium, and I'd rather not be stumped by a 9th-grader's question.

I like to point out to kids that they are made of stardust. It tends to intrigue them.

Thanks again.



JP
 
Go for it - it's one of the coolest bits of astronomy!
Essentially all of the protons/neutrons in your body came from the big bang
All the carbon/nitrogen and light metals were made by early generations of stars, then swept up in the dust and gas that created the solar system - then most metals and everything bigger than iron came from a supernova.

So the gold in the kid's jewelry came from an exploding star !
 

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