Introduction
Galaxies are presented in the universe and are the sprawling systems in the space. The galaxies are significantly composed of the unlimited number of the stars, gas and dust. However, the number of galaxies cannot be determined by the humans from the earth. Consequently, the discovered number of galaxies is above 100 million which Aare all similar in some aspects. The galaxies can be categorized on the basis of the presence of a difference in the components of the galaxies. Moreover, categorization of the galaxies can be done through the shape of the galaxy which includes: spiral galaxy, elliptical Continue reading...