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In previous papers we have published preliminary results on the stellar oxygen-abundance gradient in M33 by using B-type supergiants. In the present study, we include one new B-supergiant and derive effective temperatures and gravities for these stars. The determination of atmospheric parameters is based on analyses of silicon ionisation balance.

With the recent advent of large, ground-based telescopes and space telescopes, it is now possible to study in detail stars outside our galaxy--in neighboring galaxies in the so-called Local Group. The VIII Canary Islands Winter School of Astrophysics gathered leading experts from around the world to review this exciting new area of research-

From a new mosaic image in the Hα line of the complete disc of the spiral galaxy M100, a catalogue is composed listing 1948 individual H II regions. I give details of the data collection and reduction procedure, and of the production of the H II region catalogue. For each H II region, the catalogue gives its position relative to the centre of the

Spectroscopic monitoring of a wide range of supernovae of different types and at different evolutionary stages has been carried out. The observations were taken using the same instrumentation throughout, and the data have been gathered together in the CANARIAN SUPERNOVAE ARCHIVE (CSNA). The data have been used to carry out an extensive study on

We present preliminary results of long-slit spectroscopic observations of the extended emission line region (hereafter, EELR) in NGC 4388. We detect broad emission lines in the line complexes Hα+[NII] and [SII] which can be modelled by the superposition of several narrow components. Multicomponent line profiles appear at positions very close to the