Sun
Sun is situated in the middle of Solar system. It is the star. Nine planets revolve around the sun. Sunlight from sun helps all living beings through photosynthesis and has huge impact on earth’s climate. The sun’s surface has heavy elements like hydrogen about seventy four percent of its mass, helium about twenty four percent of its mass and other elements like iron, sulphur, magnesium, carbon, neon and others in small quantities. The surface temperature of sun is approximately 5500’C.