Abstract
The number of galaxies with UV excess relative to normal galaxies is determined and other statistical characteristics of galaxies with UV excess are also presented.V.A. Ambartsumian's idea of the activity of galaxy nuclei, suggested 30 years ago, has played a great role in the development of extragalactic astronomy. He showed that the evolution of galaxies depended on the activity of their nuclei. According to Ambartsumian (1958) the nuclei of galaxies are active if explosions take place in them. These explosions lead to large radio fluxes and in general to the wide range of phenomena normally associated with nuclear activity.The spectra of active galaxies show ultraviolet (UV) excess and emission lines of hydrogen and other elements. In other words, the UV excess and emission lines which are observed in the spectra of galaxies are the consequence of active processes.
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