interstellar lines

interstellar lines

[¦in·tər¦stel·ər ′līnz]
(astronomy)
Dark, narrow lines in the spectra of stars, caused by absorption of radiation by a gaseous medium in space.
References in periodicals archive ?
Heavenly Veil "Study of the composition of the interstellar medium calls for powerful instrumental equipment, because the interstellar lines are to be observed only on a background of the spectra of distant stars.