Protactinium

Protactinium is a rare and highly radioactive metal that exists in minute quantities within the universe. As part of the actinide series, it shares characteristics with other heavy elements and exhibits high radioactivity and instability. From an astronomical standpoint, protactinium's presence is exceptionally sparse and is not typically observed or detected in celestial bodies, stars, or cosmic entities. Its most common isotope, protactinium-231, has a relatively short half-life of about 32,000 years, making its abundance beyond terrestrial confines extremely limited. While trace amounts may be found as a decay product of uranium ores on Earth, its role or impact in astronomical observations or celestial bodies remains negligible due to its rarity and minimal presence beyond our planet.