1. Agronomy: The science of soil management and crop production.
2. Astrobiology: The study of life in the universe, including its origin, evolution, and distribution.
3. Astrophysics: The branch of astronomy that deals with the physical properties and processes of celestial objects.
4. Anthropology: The study of humankind, including its origins, development, and culture.
5. Archaeology: The study of human history and prehistory through the excavation and examination of material remains.
6. Aeronautics: The science and technology of flight, including the design, construction, and operation of aircraft.
7. Aeronomy: The study of the Earth's upper atmosphere and its interactions with the Sun and other celestial bodies.
8. Astrogeology: The study of the geology of celestial bodies, such as planets, moons, and asteroids.
9. Acoustic Science: The study of sound and its properties, including its generation, transmission, and reception.
10. Animal Science: The study of domesticated animals, including their genetics, nutrition, health, and reproduction.