The we see in the sky ae stars. Stars are giant balls of gas in space that shine through the darkness. Our Sun is an average star.
They formed from dust and ga clouds between the older stars. There are many clouds in space and the gravity of the stars pull more and more clouds together and became tigther and tighter. Millions of year lter, the centre of the cloud is pulled into a shape of a big ball. The gravity pull the big ball of gas together until the centre is very thick. It was tight that it became hot. It became so hot the ball begin to glow with fierce heat, forming a star.