If you think Helium is difficult to synthesize try making gold! All stars produce He from fusion of H over their main life stage, towards the end when the H is running low they start fusing H and He etc etc to make heavier elements, but how much they do so depends on their mass. Gold is towards the end of the list of stable elements. Making it requires massive stars going supernova. Our own sun will never be capable of making gold. At most it’s going to make some nitrogen, carbon and oxygen in its death throws
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