The Sun is in the center of the solar system with nine planets moving round it. The light given by the Sun is responsible for life in this earth. It is believed that one half of the earth is always facing the Sun. The lighted half of the Earth experiences day while the other half is in the earth’s shadow and it experiences night.The shape of the sun does not appear to change from day after day.
Moon rotates around the Earth. It is a satellite of the Earth. The moon is in fact a natural satellite of the Earth. The moon’s orbit around the Earth is not a perfect circle. It is wobbly but very regular.The shape of the moon appears to change from night to night .