Polonium

Polonium bears limited astronomical significance primarily due to its extreme rarity and unique formation mechanisms. Generated during nucleosynthesis processes within stars, particularly through specific radioactive decays and synthesis pathways, polonium's abundance in the universe remains exceptionally low compared to other elements. Being a radioactive element with a notably short half-life, polonium is generally not naturally prevalent in stars but is produced in trace amounts through the radioactive decay of heavier elements within stellar environments. Its spectral characteristics primarily manifest in the X-ray spectrum due to its radioactive nature, offering potential for identification in specific stellar phenomena or remnants.