The evolutionary nature of the young galactic clusters, from both observational as well as theoretical points of view, is briefly discussed. In addition, some of the interesting properties of the individual objects associated ...

The θ-z test devised by Burbidge et al, (1972, 1990) may serve as a powerful test to decide the reality or otherwise of the physical association hypothesis for the QSO-bright galaxy close pairs with discrepant redshifts. ...