1. Core:
* Function: This is the Sun's power plant. Here, nuclear fusion occurs, converting hydrogen into helium and releasing immense amounts of energy in the form of light and heat. This is the source of the Sun's energy and light.
* Size: About 25% of the Sun's radius.
* Temperature: Around 15 million degrees Celsius (27 million degrees Fahrenheit).
2. Radiative Zone:
* Function: Energy from the core travels outward through this zone as electromagnetic radiation (photons). It's a dense, hot zone where energy is absorbed and re-emitted, slowing down its travel significantly.
* Size: Extends outward from the core to about 70% of the Sun's radius.
* Temperature: Decreases gradually from about 7 million degrees Celsius (12.6 million degrees Fahrenheit) at the core's edge to about 2 million degrees Celsius (3.6 million degrees Fahrenheit) at the outer edge.
3. Convective Zone:
* Function: Here, the energy transfer mechanism switches to convection. Hotter, less dense gas rises, while cooler, denser gas sinks, creating a pattern of circular currents that carry heat from the radiative zone to the surface.
* Size: Extends from the radiative zone to the Sun's surface (photosphere).
* Temperature: Decreases from about 2 million degrees Celsius (3.6 million degrees Fahrenheit) at the radiative zone's edge to about 5,500 degrees Celsius (9,932 degrees Fahrenheit) at the photosphere.
4. Photosphere:
* Function: This is the visible surface of the Sun. It's the layer we see when we look at the Sun. It's not a solid surface, but a layer of gas where the Sun's energy becomes visible as light.
* Size: About 500 km (311 miles) thick.
* Temperature: Around 5,500 degrees Celsius (9,932 degrees Fahrenheit).
5. Chromosphere:
* Function: A thin layer above the photosphere, often appearing reddish during solar eclipses. It's responsible for generating the Sun's ultraviolet radiation.
* Size: About 2,000 to 10,000 km (1,243 to 6,214 miles) thick.
* Temperature: Increases with altitude, ranging from about 4,300 degrees Celsius (7,772 degrees Fahrenheit) at the photosphere's edge to about 20,000 degrees Celsius (36,000 degrees Fahrenheit) at its upper boundary.
6. Corona:
* Function: This is the Sun's outer atmosphere, extending millions of kilometers into space. It's a very hot, low-density plasma, responsible for the solar wind, a stream of charged particles that flows outward from the Sun.
* Size: Extends millions of kilometers into space.
* Temperature: Reaches millions of degrees Celsius (millions of degrees Fahrenheit), much hotter than the surface of the Sun, a mystery scientists are still trying to unravel.
Beyond these layers, there's also the Heliosphere, a bubble-like region of space dominated by the solar wind, extending far beyond the orbit of Pluto.
These layers work together to create the Sun, our star, and the energy that sustains life on Earth.
