The dependent ability for elements to absorb light in steller atmospheres is the surface temperature of the star.
Most interstellar gas is at a lower temperature than that of stellar atmospheres and the density of interstellar gas is less than that of stellar atmospheres.
Chemical elements were formed by stellar nucleosynthesis.
Stellar's Jay birds adaptations have the ability to fly. Fly Like A Bird!
Svein Rosseland was a Norwegian astrophysicist known for his work on the theory of stellar atmospheres and effectively explaining the structure of stars. His notable contributions include developing the Rosseland mean opacity used in stellar atmospheres and radiation transfer theory.
If your referring to Stellar Nucleosynthesis, then its when stars fuse the smaller elements (Hydrogen,Helium) to make the heavier elements (iron, gold, silver,zinc, etc).
The endpoints of stellar evolution are: White Dwarf Neutron Star Black Hole The endpoint is dependent upon birth mass of the star.
This is caused by fusion of light elements in stars, which releases heat.
Up to uranium elements are made by stellar nuclear synthesis; after uranium elements are man made.
it is the cycle of stellar evolution
Nucleosyntheis
Scientist believe that stellar evolution contained only hydrogen and then helium.
supernova