Astatine

Astatine maintains minimal astronomical relevance owing to its extreme rarity and inherent challenges in detection. Formed during nucleosynthesis processes within stars, primarily emerging from the decay of heavier elements, astatine's presence in the universe remains exceptionally scarce, ranking among the rarest naturally occurring elements. It is generally not naturally prevalent in stars, existing in trace amounts generated through the decay of heavier elements within specific stellar environments. Astatine's spectral characteristics might manifest, albeit minimally, in the X-ray spectrum due to its radioactive nature, potentially offering insights into its presence in specific astrophysical contexts.