1. Core:
* Location: The innermost layer, extending to about 25% of the Sun's radius.
* Conditions: Extremely dense and hot (around 15 million degrees Celsius).
* Process: Nuclear fusion occurs here, converting hydrogen into helium and releasing immense energy in the form of light and heat. This energy powers the Sun.
2. Radiative Zone:
* Location: Surrounds the core, extending to about 70% of the Sun's radius.
* Conditions: Still very hot and dense, but less so than the core.
* Process: Energy from the core travels outwards through this zone via radiation, a slow process where photons are constantly absorbed and re-emitted by atoms.
3. Convective Zone:
* Location: Extends from the radiative zone to the surface of the Sun.
* Conditions: Hotter at the bottom and cooler at the top.
* Process: Energy is transported upwards via convection, where hot gas rises, cools, and sinks back down in a continuous cycle.
4. Photosphere:
* Location: The visible surface of the Sun, about 500 kilometers thick.
* Conditions: Relatively cool (around 5,500 degrees Celsius), although still extremely hot.
* Process: This is where light and heat from the interior escape into space. Sunspots, cooler areas on the photosphere, appear darker.
5. Chromosphere:
* Location: A thin layer above the photosphere, extending up to about 2,000 kilometers.
* Conditions: Temperature increases with altitude, reaching about 20,000 degrees Celsius.
* Process: This layer is responsible for solar flares, bursts of intense energy, and prominences, large loops of gas.
6. Corona:
* Location: The outermost layer of the Sun's atmosphere, extending millions of kilometers into space.
* Conditions: Extremely hot (millions of degrees Celsius), and very low density.
* Process: This layer is responsible for the solar wind, a continuous stream of charged particles that flows outward from the Sun.
The Sun's structure is constantly changing due to the ongoing nuclear fusion in its core. These changes can have a significant impact on Earth, affecting our climate and technology.
