Creation of elements heavier than iron

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SUMMARY

Heavier elements than iron are formed primarily through supernovae, where the collapse of a star allows for non-equilibrium reactions that produce these elements. The discussion highlights that all protons and neutrons originated from the Big Bang, while lighter elements like carbon and nitrogen were synthesized by early stars. The creation of metals and elements heavier than iron occurs during supernova explosions, which distribute these materials throughout the universe, contributing to the formation of solar systems.

PREREQUISITES
  • Understanding of stellar fusion processes
  • Knowledge of supernova mechanics
  • Familiarity with the Big Bang theory
  • Basic concepts of nucleosynthesis
NEXT STEPS
  • Research the process of nucleosynthesis in supernovae
  • Learn about the lifecycle of stars and their evolution
  • Explore the role of supernovae in distributing heavy elements
  • Investigate the Big Bang nucleosynthesis and its implications
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Astronomy enthusiasts, astrophysics students, educators in science, and anyone interested in the origins of elements in the universe.

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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