Entropy of a Star: Calculating Sun & Neutron Stars

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The entropy of stars like the sun and neutron stars can be calculated using the Boltzmann entropy equation, S=k*ln W, where W represents the number of distinguishable arrangements of atoms or molecules. While this formula applies to many systems, its direct application to neutron stars is uncertain. The entropy of black holes is defined by a different formula involving area and fundamental constants. Additionally, the power output of the sun, along with the enthalpy and entropy of fusion reactions, allows for straightforward calculations of its entropy. Understanding these concepts is crucial for astrophysical thermodynamics.
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How is the entropy of a star like the sun or a neutron star calculated?
 
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to calculate the thermodynamical entropy, I suppose that you could use the famous Boltzmann entropy equation:
S=k*ln W
W is the number of distinguishable arrangements of atoms/molecules.
If you are able to figure out W, work done!
 
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Since we know the power output of the sun and we know the enthalpy and entropy of a fusion reaction, its just an easy ratio.
 

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