1. Chromosphere: This layer lies above the photosphere and is characterized by its reddish glow. It's about 2,000 kilometers (1,200 miles) thick and has a temperature range of 4,000 to 50,000 degrees Celsius (7,200 to 90,000 degrees Fahrenheit). The chromosphere is responsible for producing solar flares and prominences.

2. Transition Region: This thin layer separates the chromosphere from the corona. It is marked by a sharp temperature increase, reaching millions of degrees Celsius.

3. Corona: The outermost layer of the Sun's atmosphere, extending millions of kilometers into space. It is extremely hot, reaching temperatures of over a million degrees Celsius (over 1.8 million degrees Fahrenheit). The corona is responsible for the solar wind, a stream of charged particles that flows out from the Sun.

Here's a quick breakdown:

* Photosphere: The visible surface of the Sun, where sunlight is emitted.

* Chromosphere: Above the photosphere, reddish glow, responsible for flares and prominences.

* Transition Region: A thin layer separating the chromosphere and corona, with a sharp temperature increase.

* Corona: The outermost layer, extremely hot, responsible for the solar wind.