Is+the+sun+a+star?

Yes, the sun is a star. In fact it is an extremely close star to earth, that is why when we look at it, the star loks so big. It is situated at the centre of the Solar system, having a diameter of about 1,392,000 kilometers. 3/4 of the sun's mass consists of hydrogen with helium as the major of the remaining substances. Only under 2% of the sun has heavier elements such as oxygen, carbon, neon, iron and many others.