Complete Education Regarding The Sun‏

The Sun is one of many stars that can be found in the solar system, except that it is the biggest. It has a very huge size and covers 98 percent of the overall size of the solar system. With an average rotation of twenty five days at the equator, and thirty six days at the poles the Sun is really big. 
It has a diameter of 1,392,000 kilometer and is 109 times the total size of Earth. The Sun is divided into three major parts, and is made up of hydrogen mass and the rest is helium and other types of gasses. The Sun orbits the galactic core approximately 25,000 light years and makes a complete revolution every 250,000 years.
Inside the Sun, there are 3 basic elements which are a Core, Radiative and Convective zones. The centre is called the core, and a great energy is made here through a process that is referred to as nuclear fusion. This energy is then transferred to the closest zone called the Radiative zone. The Radiative zone makes up eighty five percent of the Sun's radius.
The Convective zone is the part just below the Sun's surface and covers about fifteen percent of the surface of the Sun. Energy is transported by a bulk motion of gas, and this is a process called convection.
The outer visible layer is referred to as Photosphere with a temperature of six thousand degrees Celsius. This outer layer looks mottled because of the turbulence of energy eruptions at the surface.
The photosphere is called the Sun's surface because it consists of photons that do break out into space. The thickness is about five hundred km and not an everyday thing that can be seen using the eyes only. It is severely hot and very gaseous.
The area above the photosphere is called the Chromosphere. Solar energy passes through the Chromosphere from the core. The bright luminous hydrogen clouds are called Faculae and form sunspots above.
Studies show that the Sun has been active for the past 4.6 billion years and will keep burning for another five billion years or more. It also indicates that the Sun will start fusing helium at the end of its life into heavier elements and start to swell and grow so large to swallow the Earth. It will collapse after a billion years to what is known as white dwarf, and may take up to a trillion years to completely cool off and fade into what is called a black dwarf.