We present first results of the analysis of X-ray data (ROSAT PSPC and HRI pointings) and optical observations of the open cluster NGC 2451. This object consists of two different clusters A and B in the same line-of-sight at distances of 190 and 360 pc, respectively. NGC 2451A is one of the 10 nearest clusters, but has been little studied because

H &alpha luminosities are presented in order to study the Star Formation Rates (SFRs) of a sample of galaxies in compact groups from Hickson's (1982) catalogue. Although the comparison of the SFRs of the disk galaxies in our sample with those of a sample of field galaxies yielded no difference between the average SFRs for disk galaxies in compact

A first experiment was performed with the Binary Reaction trigger Spectrometer (BRS) for Euroball, as second last experiment of phase III. The reaction 24 Mg(32S, 56Ni*) at E=163.5 MeV was chosen in order to populate a specific hyperdeformed resonance state in the compound nucleus 56Ni* at E*=84 MeV (Jπ=46+) and to investigate the spectroscopy of

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