The Universe’s first stars after the Big Bang would have consisted entirely of elements like hydrogen, helium, and small amounts of lithium.Those stars then produced elements heavier than helium in their cores and seeded the Universe with them when they exploded as supernovae.The next generation of stars formed from clouds of material laced with those metals, incorporating them into their makeup.The metal content, or metallicity, of stars in the Universe increased as the cycle of star birth and death continued.2MASS J18082002-5104378 B, also known as Gaia DR2 6702907209758894848 B, is unusual because unlike other stars with very low metal content,...