The authors present the orbitally-modulated UV and optical emissions from SS Cygni in quiescence, essentially based on their multifrequency observations with a discussion in order to demonstrate the possibility that this system is an intermediate polar.

The analysis of the efficiency of accretion in the X-ray binary system A 0535 + 26/HDE 245770 and of the specific angular momentum of the matter accreted during its X-ray outbursts leads to the conclusion that there are two disks present in the system. An excretion disk around the Be star HDE 245770 and an accretion disk (possibly temporary) around

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Contents: Vol. I: The Sun and solar-like stars. Stellar structure and evolution. Astronomical instrumentation. General lectures. Vol. II: Structure and evolution of galaxies. Active galaxies and cosmology. Interstellar and intergalactic medium.

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