During the OJ-94 campaign for the blazar OJ 287 the authors have obtained the best ever observed optical light curve for any extragalactic object. They have monitored this blazar since fall 1993 and have collected over 2000 optical photometric observations. The light curve shows continuous activity down to timescales of tens of minutes, with

During the OJ-94 campaign one monitored the blazar 3C 66A as a secondary target. Here the authors present the observed V-band light curve. This blazar was in outburst during the monitoring campaign, reaching V-magnitude 13.7. This is the brightest it has ever been observed. The light curve shows continuous activity in time scales from tens of

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This volume contains the eight courses which were delivered during the School. The aim of the lectures was to portray a thorough view of our present knowledge on the formation and evolution of galaxies. Topics include the formation of large-scale structure, clustering of galaxies and the morphological and chemical outcome of galaxy interactions and