Azimuthally averaged surface brightness profiles of disc galaxies provide a most useful practical classification scheme which gives insights into their...

In the present paper I want to tell of my impressions about the world of research in astrophysics, which I know from close observation. I see with certain...

Detection of optical surface brightness structures with magnitudes fainter than 30 mag/arcsec2 has remained elusive in current photometric deep surveys. We are...

RR Lyrae variables are old (>10 Gyr) stars and, as such, they are useful probes of the earliest events of star formation in galaxies (Bernard et al. 2008...

Planetary nebulae (PNe) are excellent tracers of stellar populations with low surface brightness, and therefore provide a powerful method to detect and explore...

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stronomers have long learned to classify spirals in terms of their morphological features, primarily their bulges, discs, and bars. In addition other properties...

Equinox, what a controversial concept! Since the dawn of archaeoastronomy this has arguably been the most problematic concept—perhaps together with the lunar...

Doing research is fighting, what any other thing the human being could do? Fight against powers or to get powers, that depends on us. Science can be a...