The Sun is the biggest star that can be found amongst the solar system. It is so big to the point that it contains about 98 percent of the entire mass in the solar system. It rotates about 25 days around the equator, and 36 days around the poles.
The Sun’s diameter is about one million three hundred and ninety two thousand km, and about one hundred and nine times the size of Earth put together. A three quarter of it is comprised of hydrogen mass with the remaining components being helium and other gases. Studies show that it orbits about twenty five thousand light years from the galactic core and completes a revolution once in every two hundred and fifty million years.
The Sun’s interior comprises of a Core, Radiative and Convective zones. The core is the innermost part where energy is generated through nuclear fusion. It is extremely hot and dense. The energy is transported from the hot core to the Radiative zone which is colder and covers about eighty five percent of the radius of the Sun.
The Convective zone is next to the Radiative zone and occupies a space of up to 15 percent of the Sun’s surface. The energy coming from the innermost part is moved here through stages called convection.
The Photosphere which is the visible layer has a temperature of approximately 6,000 degrees Celsius. It always seems molted as a result of the turbulence created by energy eruptions.
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.
Next to the Photosphere is a region called the Chromosphere. The energy emanating from the core, passes through all the way to the Chromosphere. The hydrogen clouds forming at the top is called Faculae and makes sunspot directly at the top.
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.
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