The Solar System

solar system  The solar system -There are eight planets in our solar system and the sun.The eight planets revolve around the sun in their respective orbits.Our solar system is located in outward spiral of  milky way galaxy. The evolution of solar system -A question sometimes arises in our mind , how were the sun and its companions born ?Some scientists believe that a giant cloud of gases and dust,called Nebula,appeared moving in the space about 4.6 billions of years ago.It cooled gained very fast rotation .The eight balls of gases of different sizes separated from the Nebula.The remaining central mass of nebula changed into a star known as the sun.The eight balls changed into plants.It is believed that satellites formed when small bolls of gases separated from the central mass. Galaxies - Though there are billions of celestial bodies spread in the vast universe.They are not uniformly distributed in the space.The countless stars in the universe form  huge clusters .We are li