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How can the upper limit for a star's mass be calculated?

A basic argument would go something like this: If you assume that the opacity in the star's envelope is dominated by Thomson scattering from free electrons, then it is simple enough to show (e.g. see ...
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Does mass create space?

The issue seems debated, since the two most upvoted answers give opposite conclusions. I decided to carry out the full calculation, hoping to settle the matter. Let's settle the scene: we built a ...
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How to calculate metallicity of a star that is made of iron of 20kg and Hydrogen 1000 kg?

You cannot calculate the solar ration of $\mathrm{Fe/H}$ nor can you calculate the logarithmic ratio of iron to hydrogen for a star - both are entities you have to measure. So in order to calculate ...
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