Fermium

Fermium is a synthetic and highly radioactive element predominantly formed through human-made nuclear reactions, making its occurrence extremely rare in natural astronomical contexts. Its artificial creation and limited presence beyond Earth contribute to its minimal astronomical significance. Fermium's isotopes exhibit very short half-lives, often lasting from days to years, further contributing to its scarcity in celestial bodies or cosmic environments. Its synthetic nature confines its existence primarily to controlled laboratory conditions, such as in nuclear reactors or as a byproduct of nuclear processes.