How do you distinguish between astronomy, cosmology, and astrophysics? What are their links with physics?

The study of bodies in the sky, such as planets, moons, comets, stars, galaxies, nebulae, and other objects, is known as astronomy. It entails determining the position, distance, motion, and brightness of these bodies.

Understanding the cosmos entails asking questions about its origins, evolution, and future state. Cosmology aims to provide an overall understanding of the universe.

Understanding how stars, galaxies, and other objects function is the goal of astrophysics, which studies the physics and chemistry of these objects. It is used to ascertain the chemical makeup of gas clouds, planet atmospheres, and star fusion reactions.

Cosmology and astrophysics are just two of the many subfields that make up the vast field of astronomy.

Astronomy focuses on observing and studying celestial objects and phenomena. Cosmology examines the origin, evolution, and eventual fate of the universe as a whole. Astrophysics applies the principles of physics to understand the behavior and properties of celestial bodies and systems. All three fields are closely linked with physics as they rely on physical laws and principles to explain the workings of the universe.