An astronomer is a scientist in the field of astronomy who studies stars, planets, moons, comets and galaxies, as well as many other celestial objects--either in Observational astronomy, in analyzing the data or in theoretical astronomy.
An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside of the scope of Earth. They look at stars, planets, moons, comets and galaxies, as well as many other celestial objects--either in Observational astronomy, in analyzing the data or in theoretical astronomy.