The layer between the photosphere and the corona in the atmosphere of the Sun, or any other star, mainly composed of excited hydrogen atoms. It can be seen only during total eclipses extending from the photosphere to a height of 2000 km. Its temperature ranges from 4500?°K at the bottom to 1,000,000?°K at the top, where it merges with the outermost layer, the corona.
Comments: Chromosphere