Astronomy And Astrophysics

                                  A study about the celestial objects and the various phenomena connected with them can be said as Astronomy. Astrophysics is only its extension where the nature of stars and other cosmic objects are studied using physical laws. Observations using telescope show that stars are self luminous spherical objects like the sun.some of them are much larger and brighter and others are smaller and dim. Some stars have larger size than sun but appears as dim because they are far away from us. Astronomy is an observational science where the experiments occur naturally in the stars, galaxies or interstellar medium,uncontrolled by the observer. Since repetition of an event is impossible, a statistical study of a large number of similar events are conducted before arriving at conclusions.