Topic summary
Solar atmosphere
Extracted from the Wikipedia article Sun.
Atmosphere
The solar atmosphere is the region of the Sun that extends from the top of the convection zone to the inner boundary of the heliosphere. It is often divided into three primary layers: the photosphere, the chromosphere, and the corona. The chromosphere and corona are separated by a thin transition region that is frequently considered as an additional distinct layer. Some sources consider the heliosphere to be the outer or extended solar atmosphere.