A chromosphere is the second layer of a star's atmosphere, located above the photosphere and below the solar transition region and corona. The term usually refers to the Sun's chromosphere, but not exclusively.
The red color of the chromosphere could be seen during the solar eclipse of August 11, 1999.
The stellar atmosphere is the outer region of the volume of a star, lying above the stellar core, radiation zone and convection zone.
Photo taken in France during the 1999 solar eclipse