The heavy elements could most plausibly have been produced by endothermic nuclear reactions during a supernova, or by transmutation through neutron absorption within a massive second-generation star.
Elemen-elemen ini sangat mungkin dihasilkan oleh reaksi nuklir endotermik selama supernova atau transmutasi melalui penyerapan neutron di dalam sebuah bintang raksasa generasi kedua.