An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of earth. They observe astronomical objects such as stars, planets, moons, comets and galaxies – in either observational (by analyzing the data) or theoretical astronomy. Examples of topics or fields astronomers study include planetary science, solar astronomy, the origin or evolution of stars, or the formation of galaxies. Related but distinct subjects like physical cosmology, which studies the universe as a whole.

Astronomy is the natural science that involves studies celestial bodies. Celestial bodies are objects in the universe apart from earth. Thus, astronomers are the scientist who studies astronomy. They study all the celestial bodies outside earth. As an astronomer, you will observe stars, sun, planets, moons, comets, meteorites, galaxies, black holes, etc.