. . "envelope" . "atmospheres" . "stellar atmosphere" . . . "upper atmosphere" . . "atmosphere" . "Stellar atmosphere" . "envelopes" . "stellar envelope" . "star's atmosphere" . "outer atmosphere's" . "atmosphere of a star" . "in stars" . "Sun's atmosphere" . "Stellar atmosphere" . "outer envelope" . "atmospheres of the Sun and other stars" . "outer layers" . . . "Astrophysics of stellar atmospheres" . "outer atmosphere" . "atmospheric" . .