Dust cloud hypothesis describes the origin of solar system by the accumulation of dust and gaseous cloud. It is proposed by Kalluan and Cuiper in 1944 A.D. According to them, the light of the stars pushed the atoms of dust and gases to form a large particles. In this way its size increased and nuclear fusion reaction started, which results in the formation of sun. The remaining matter started to spin faster around the sun and finally formed the planets and satellites.