A star is a self-radiating divine body made up of a mass of gas held together by its own gravity. The birth of a star begins inside a molecular cloud. Stars form within these rather dense concentrations of interstellar gas and dust. The process of star formation has long been a mystery due to the limitations of vision. Large quantities of small solid particles blocked our view of the stars beyond the molecular cloud. Infrared technology now provides some information about how a star forms. Cloud cores contain sources of intense infrared radiation, evidence of energy from collapsing protostars (potential energy converted to kinetic energy). Furthermore, young stars find themselves surrounded by clouds of gas, the remaining dark molecular cloud. Young stars with hot cores usually appear in clusters, groups of stars that form from the same cloud core. We will discuss what special elements are included in the molecular clouds that determine the birth of stars. Basic Characteristics of Clouds Molecular clouds are considered the densest parts of the interstellar medium in galaxies. They were dis...