The relation between nuclear star clusters (NSCs) and the growth of the central supermassive black holes (SMBHs), as well as their connection to the properties of the host galaxies, is crucial for understanding the evolution of galaxies. Recent observations have revealed that about 10% of nucleated galaxies host hybrid nuclei, consisting of both

The Roque de los Muchachos Observatory (ORM), part of the Observatorios de Canarias (OCAN) alongside the Observatorio del Teide (OT) on Tenerife, is one of the most important astronomical sites in the world. Together, these observatories host the telescopes and instruments of around 60 institutions from over 20 countries, forming the EU's largest

A few remarkable examples of alternative cosmological theories are shown, ranging from a compilation of variations on the Standard Model (inhomogeneous universe, Cold Big Bang, varying physical constants or gravity law, zero-active mass, Milne cosmology, cyclical models), through the more distant quasi-steady-state cosmology, plasma cosmology, or