Geochemistry and astrochemistry are both fields of study that explore the chemical composition of matter, but they focus on different environments. Geochemistry studies the chemical processes and composition of the Earth, including the analysis of rocks, minerals, water, and the atmosphere to understand Earth’s formation, evolution, and ongoing processes. Astrochemistry, on the other hand, focuses on the chemical composition of the universe, particularly in space, such as the study of interstellar dust, gas, and the chemical processes occurring in stars, planets, and galaxies. Geochemistry deals with Earth’s materials, while astrochemistry investigates the broader cosmos.