1. the branch of chemistry that studies the chemical composition and reactions of celestial bodies and the universe.
Usage: scientific field; often used in academic and research contexts

Examples

• Cosmochemistry helps scientists understand the elemental makeup of meteorites and asteroids.
• The study of cosmochemistry has revealed the origins of heavy elements in the cosmos.
• Researchers in cosmochemistry analyze samples from space missions to learn about planetary formation.
• Cosmochemistry combines principles of chemistry and astronomy to explain stellar nucleosynthesis.
• The field of cosmochemistry examines how chemical elements are distributed throughout the universe.