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’s atmosphere and having their own physical and chemical properties. Some different views include –Astronomy 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.






