High Mas X-ray Binary Systems are important sources of information for many astrophysical fields of research. They are composed by a compact object (black hole...

Since the early 50' of last century the study of Horizontal Branch stars in Galactic GCs has been of pivotal relevance since the core He-burning stage is an...

In recent years accurate photometric and spectroscopic observations have provided sound evidence that Galactic Globular Clusters can not be longer considered...

Globular clusters (GCs) are fascinating objects nearly as old as the Universe that provide insight on a large variety of astrophysical and cosmological...

Massive stars are often found to be in pairs. This configuration is both a blessing and a curse. From it, we can estimate their exact properties such as their...

The origins of neutron(n)-capture elements (atomic number Z > 30) have historically been discerned from the interpretation of stellar spectra. However, in the...

In this talk I will present the our work on an exotic group of evolved objects: post-AGB and post-RGB stars and the excellent constraints they provide for...

The proper characterization of the least massive population of the young Sigma Orionis star cluster is required to understand the form of the cluster mass...

After a brief outline on the impact of massive stars for the cosmic and galactic evolution, we highlight the role of Nitrogen as a key element to test current...