- For the public
- Teachers and pupils
Recent observations have revealed the structural properties of the dark and luminous mass distribution in galaxies of different luminosity and Hubble Types. These results led to a new and amazing scenario. The investigation of single and coadded objects has shown that the rotation curves of spirals follow, from their centers out to their virial radii, an universal profile that implies a tuned combination of their stellar disk and dark halo mass distributions. This, alongside with accurate mass modeling of individual galaxies, poses important challenges to the ΛCDM colliosionless particle. More importantly, it provides unique informations on the nature of the dark particle protagonist in the structure and evolution of the Universe.