was this field present during ancient times also?
Yes, it was concerned with the classification and description of phenomena in the sky.
Astronomer
Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using physical laws.
which planet is saturn? It is the sixth planet from the sun. tell me one of its physical features? It is a gas giant with an average radius of about nine times that of Earth. what is this last one you mentioned? Earth is the third planet from the Sun how is the atmosphere around the former planet? The outer atmosphere of Saturn contains 96.3% molecular hydrogen and 3.25% helium by volume. which spacecraft was sent to it? The "Cassini–Huygens" space probe . which ring does it has? It has planetary rings composed mostly of water ice. where did the probe get its name from? From Giovanni Domenico Cassini and Christiaan Huygens. when was it sent to that particular thing in the space? 15 October 1997. what was the former person's profession? He was an mathematician, astronomer and engineer. what does the second one do in general? 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.
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Astronomer [SEP] Academic
Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using physical laws. Today, that distinction has mostly disappeared and the terms "astronomer" and "astrophysicist" are interchangeable. Professional astronomers are highly educated individuals who typically have a PhD in physics or astronomy and are employed by research institutions or universities. They spend the majority of their time working on research, although they quite often have other duties such as teaching, building instruments, or aiding in the operation of an observatory. The number of professional astronomers in the United States is actually quite small.