Diagram of the structure of the sun.

In science, the sun is a larger atomic body, formed 4.6 billion years ago, comprised mostly of hydrogen and helium atoms, located at the center of the solar system, that, through a process of hydrogen burning, continuously releases or radiates heat to its surroundings.

In planetary chemistry, the sun is viewed as a 72-element thermonuclear "sun molecule". In earth system thermodynamics models, the sun acts as the boiler or hot body, instilling a solar flux of 1370 watts per meters squared, powering heat engine cycles on the surface sections of the earth.

External links
● Sun – Wikipedia.