We derived the stellar parameters of a sample of Galactic early-O type stars by analyzing their UV and far-UV spectra from the Far Ultraviolet Spectroscopic Explorer (905-1187 Å), the International Ultraviolet Explorer, the Hubble Space Telescope STIS, and the Orbiting and Retrievable Far and Extreme Ultraviolet Spectrometer (1200-2000 Å). The data

We use a large sample of galaxies from the Two Micron All Sky Survey (2MASS) and the Sloan Digital Sky Survey (SDSS) to explore the distribution of galaxy luminosities, stellar and baryonic masses, and sizes in the local Universe. Assuming a universally-applicable stellar IMF, highlights include the following. i) The 'faint end slope' of the

We present a study of the stellar parameters, distances and spectral energy distributions (SEDs) of HD 34282 and HD 141569, two pre-main sequence Herbig AeBe stars. Both objects have been reported to show ``anomalous positions'' in the HR diagram in the sense that they appear below the main sequence. A significant result of this work is that both

Catalog of stellar objects in the Serpens cloud field. Observations from ESO NTT/SOFI reductions with DaoPhot. (1 data file).

We present first results concerning the detection of variable stars in the Carina dwarf Spheroidal from B, V images collected with the 4-m CTIO telescope. We show a sample of candidate variables spanning from the tip of the Red Giant Branch down to the Main Sequence turn off. Finally, we discuss the future photometric and spectroscopic developments

A sample of 19 low-redshift (0.03