Astronomy can be defined as the branch of science that deals with the study of natures and motion of celestial bodies like stars

Astronomy can be defined as the branch of science that deals with the study of natures and motion of celestial bodies like stars, planets and galaxies. There are yet different definitions for Astronomy. This includes the study of matter and objects outside earth抯 atmosphere and having their own physical and chemical properties. Some different views include 朅stronomy is the study of everything. This is because astronomy is the study of universe and everything is part of the universe.

One can say that all these definitions are correct and hence there are many sub fields within astronomy. Cosmologists, Astrometrists, Planetologist, Radio astronomers, Mathematical astronomers are some among these sub divisions. Cosmologists study universe as a whole including its origin and beginning. Planetologists do study about all those planets with in the solar system and those orbiting distant stars. Astrometrists calculate distances connected with universe. Again Radio astronomers use radio telescopes to study the universe. Numbers, calculations and statistics are used by mathematical astronomers in order to explain universe.

We can抰 say that astronomy is a stand alone subject. It is a combination of different fields. These fields include mathematics, geology, chemistry, physics, geology, biology. Physics can be said to be as one of the most integral part of astronomy. That is why some of the astronomers are known as Astrophysicists. Astronomy can be said to be the oldest science. During the early age, astronomers were priests and holy men, who tried to fix the puzzle of the universe. They tried to determine planting cycles and celebrations. Astronomy theories where first developed and introduced by ancient Greeks. They made out theories about the universe design as a whole. There were many astronomers who proved them to be great astronomers. Later many of the facts provided by them proved to be wrong, as technology came forward with a helping hand. Some of them include Ptolemy, Copernicus, Galileo Galilee, Johannes Kepler etc. but one fact is sure that with out the contributions of all those greats the facts known today could not have reached upon.

Again it can be said that astrology is the study of cosmos. An attempt to understand the history and make up of universe can be termed to be as astronomy. An unlimited area of fields is covered under astronomy. They include stars, nebula, planets, sol, star clusters, galaxies, dark matter, black holes etc. each of these can be again divided into multiple topics. Research is done in the whole electromagnetic spectrum. This includes ultraviolet, visible, x-ray and infrared. Thus it really covers lots of things when it comes to astronomy.