what is the diameter of the sun
The sun has a diameter of 865,000 miles or 1.39 million kilometers. Its diameter is 109 times the diameter of earth. Despite its seemingly huge size in comparison to earth, the sun is actually considered a small star and is classified as a yellow dwarf. The sun is mainly composed of hydrogen and helium.n about eight billion years it is estimated that the sun's radius (and consequently its diameter) will increase greatly due to the large amount of heat that the sun produces. This increase in heat will also change the sun's intensity by 10%, and will most likely have a very disastrous impact on Earth.