Fundamental Features:
* Photosphere: The visible surface of the Sun, where the light we see originates. It's a layer of gas about 400 km thick.
* Chromosphere: A layer of gas above the photosphere, extending up to about 2,000 km. It's a region of intense activity, often seen during eclipses.
* Corona: The outermost layer of the Sun's atmosphere, extending millions of kilometers into space. It's a very hot, low-density plasma.
* Core: The central region of the Sun where nuclear fusion takes place, generating the Sun's energy.
* Radiative Zone: A region surrounding the core where energy is transported outward by radiation.
* Convective Zone: A region above the radiative zone where energy is transported outward by convection (the rising and sinking of hot and cool gas).
Dynamic Features:
* Sunspots: Dark, cooler areas on the photosphere caused by intense magnetic activity. They appear and disappear over time, and their number varies in an 11-year cycle.
* Granules: Small, bright, and convective cells on the photosphere. They represent the rising and sinking of hot plasma.
* Solar Flares: Sudden, intense bursts of energy that erupt from the Sun's surface. They release radiation and particles into space.
* Coronal Mass Ejections (CMEs): Large eruptions of plasma and magnetic fields from the Sun's corona. They can have a significant impact on Earth's magnetic field and atmosphere.
These features are all essential parts of the Sun's structure and activity. They are constantly changing and interacting, creating the dynamic and energetic star that we see in the sky.
