Curium

Curium is a synthetic, highly radioactive element that is not naturally abundant in the universe and holds negligible astronomical significance. Produced artificially through nuclear reactions, curium's existence beyond Earth is exceedingly rare. Its various isotopes have notably short half-lives, ranging from days to centuries, contributing to its scarcity in celestial bodies or cosmic environments. Curium's synthetic nature and minimal occurrence outside human-made contexts, such as in nuclear reactors or because of nuclear fission, limit its relevance in astronomical observations or the study of celestial bodies.