Cosmic Chemistry was a science that studied the chemical elements in the universe. It mainly studied the origin, evolution, and distribution of various elements in the universe. Its research content mainly includes the following aspects: 1. The formation and evolution of elements after the Big Bang: Studying the formation and evolution of elements after the Big Bang, including the formation of heavy elements, the abundance and distribution of various elements in the universe, etc. 2. The distribution of elements in galaxies and interstellar matter: to study the origin and distribution of various elements in galaxies and interstellar matter, including the source and distribution of heavy elements such as oxygen, iron, and aluminum. 3. Element distribution in stars and planets: study the origin and distribution of various elements in stars and planets, including the source and distribution of heavy elements such as oxygen, iron, and aluminum. 4. Cosmic rays and elements in the interstellar medium: study the source, evolution and distribution of various elements in cosmic rays and interstellar medium, including the source and distribution of high-energy elements such as helium and mercury. 5. Elements in the planetary atmosphere: Study the origin, evolution, and distribution of various elements in the planetary atmosphere, including the source and distribution of light elements such as oxygen, nitrogen, and carbon. The study of space cosmic chemistry is of great significance to understanding the evolution of the universe, astrophysics, and biochemistry.