What is sun diameter?
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 was made from an enormous cloud composed of dust and gas that had a diameter of one trillion miles. Gravitational forces within the cloud caused the gas and dust particles to contract similar to the way gravity pulls everything on earth towards its center. The packed particles in the center of the cloud formed a dense core which later became the sun. Heat was produced as a result of the collapse of the particles and nuclear reactions further heated them up to form the sun.
