Cosmochemistry is the study of the chemical composition and processes of celestial bodies, including planets, moons, asteroids, and comets. It combines principles from chemistry, astronomy, and geology to understand the origins and evolution of the universe. Researchers analyze samples from space missions and meteorites to uncover the building blocks of matter in the cosmos. This field also explores the formation of elements and compounds in stars and during events like supernovae. By studying isotopes and chemical reactions in space, cosmochemists can gain insights into the conditions that led to the formation of our solar system and the potential for life beyond Earth.