Cosmochemist
Cosmochemistry is the scientific discipline that studies the chemical composition of extraterrestrial objects and the chemical processes that have shaped their history. Cosmochemists analyze the composition of meteorites, asteroids, comets, planets, moons, stars, and galaxies to understand the origin and evolution of the universe. They use a variety of techniques, including spectroscopy, mass spectrometry, and isotopic analysis, to determine the elemental and isotopic composition of extraterrestrial materials. Cosmochemists also study the chemical processes that occur in the early universe, such as nucleosynthesis and the formation of the first stars and galaxies.