The Cosmological Source of Rocks & Minerals. Yes, we are all star dust. Even Gary! . References. “Before there was chemistry: The origin of the elements” by Neil Glickstein, online. JChemEd.chem.wisc.edu, Vol. 76 No 3 March 1999.
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Yes, we are all star dust.
K-W Gem and Mineral Club
~ 73% H
~ 25% He
< 2% all other
4 main sources:
When condensing clouds ignite into thermonuclear
Reactions, around >10^7 K, a star is born!
Huge numbers of protons (H) are fused in our
Sun by the following process every second:
At temperatures exceeding 10^8 K, helium
nuclei will fuse to form carbon:
Subsequently, carbon and helium react
to form oxygen:
With increasing temperatures in the core
of the star, heavier elements form:
Stars condense from “birthing” nebulae and die as “funerary” nebulae. The “life steps” taken depend on the mass of the star:
0.1 – 1.4 solar masses = condense, main sequence star of Hertzprung-Russell Diagram (ie like our Sun). Core condenses and outer layers expand to a giant star, possible nebula, ending as white dwarf.
1.4 – 8.0 = much faster version of above, core includes iron and implodes, which is followed by a large rebound explosion (supernova)
> 8.0 = same as above, much faster, but implosion does not end as explosion. Instead it keeps collapsing and becoming denser until a black hole is formed.
star in its