# Absorption lines and emission lines in stellar spectra

Gold Member
Summary
Why do we see more absorption lines in stellar spectra than emission lines?
Why do we see more absorption lines in stellar spectra than emission lines?

The surface of the sun is cooler than the interior.

Orodruin
lomidrevo
Emission lines are present in spectrum of only few types of stars, see
https://en.m.wikipedia.org/wiki/Emission-line_star

Most of the stars exhibits only absorption lines (superimposed on the continuous blackbody radiation). As the light radiated in photosphere propagates through upper layers of stellar atmosphere, some of the wavelengths are absorbed by colder gas.