Astronomy is a field where the universal objects and phenomena is been studied. Generally, it applies theory from other subject categories such as, Mathematics, Physics and Chemistry in order to demonstrate evolution of universal objects and phenomena. Demonstrated interest includes, planets, stars, moon, nebulae, galaxies and comets. Most of the phenomena which are originated outside the earth’s atmosphere are considered under Astronomy. Physical Cosmology is the study which is reated to the universe as a whole. Astronomy has a long history. Most of the past civilizations such as Greeks, Indians, Babylonians etc. has enhanced knowledge through astrometry, celestial navigation, making of calendars etc.

Astronomy as a profession is split into Observational and Theoretical Astronomers. Observation Astronomy is focused on obtaining data by observing astronomical objects, which is then analyzed with use of basic Physics principals. Theoretical Astronomy focuses mainly on the use of developed analytical computer models to analyze and describe the phenomena. Mainly as in Theoretical and Applied Physics, both of these professions are important because the analytical results from the Observation Astronomy can be compared with the analytical results from the Theoretical Astronomy. Sri Lanka has a proud history in Astronomy because the Great Arthur C. Clarke who was in Sri Lanka for most of his lifetime. There are many institutions in Sri Lanka to become an Astronomer.