NASA, ESA, CSA, STScICompositions of first generation stars and the Sun compared.The Big Bang essentially created two elements: hydrogen and helium. It also produced tiny traces of lithium and a few other light isotopes, but in the beginning there was hydrogen and helium. All the other, heavier elements formed later, either in the cores of stars, through stellar collisions, or other astrophysical processes. Even now hydrogen and helium make up so much of the material world that astronomers re...
