What is the meaning of astronomy?

Study of Celestial Objects

The correct answer is Option 1: Study of Celestial Objects.

Astronomy is the scientific study of celestial objects, space, and the physical universe as a whole. It is the oldest science, dating back to the first civilizations. Astronomy has two main branches: observational astronomy and theoretical astronomy.

Observational astronomy is the practice of observing celestial objects using telescopes, satellites, and other instruments. Theoretical astronomy is the development of physical models of celestial objects and phenomena.

Astronomy has a wide range of applications, including navigation, timekeeping, and understanding the origin and evolution of the universe. It is also used in many other fields, such as physics, chemistry, and biology.