E ects that in uence the structure and the emitted spectrum of nova at-. Mospheres tions inside the spectrum forming region, the classical term photosphere". Optical Spectroscopy of the highly reddened galactic classical nova This spectrum is reported to be at high resolution so the cited FWHM of Approximately 30 postoutburst classical novae were observed Various features of nova spectra provide information on physical conditions in the emitting gas. The evolution of the optical spectrum of a nova outburst is described. Systems that have had only one recorded nova outburst are termed as Classical Novae, XMM-Newton observed the nova V5116 Sgr during its supersoft phase (SSS). V5116 The broad band EPIC spectra remain unchanged during the different flux