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Abstract: Quasars Quasi Stellar Objects, abbreviated as QSOs are still nowadays,close to half a century after their discovery, objects which are not completely understood. In this brief review a description of the pending problems,inconsistencies and caveats in the QSO-s research is presented. The standardparadigm model based on the existence of very massive black holes that areresponsible for the QSO-s huge luminosities, resulting from to theircosmological redshifts, leaves many facts without explanation. There areseveral observations which lack a clear explanation, for instance: the absenceof bright QSOs at low redshifts, a mysterious evolution not properlyunderstood; the inconsistencies of the absorption lines, such as the differentstructure of the clouds along the QSO-s line of sight and their tangentialdirections; the spatial correlation between QSOs and galaxies; and many others.

Autor: Martin Lopez-Corredoira


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