Our Universe is an extreme place. Indeed, the highest known densities and temperature can be found in several and very different objects. Neutron stars for example are cold (few MeV) but can reach a density six times larger than normal nuclear matter as we know it on the earth. Supernova explosions on the other end are characterized by very high temperature and copious emission of different elements.
Although these two examples seem rather disconnected, common theoretical and experimental methods can be employed to understand what is inside neutron stars and how the dynamic of supernova explosions looks like and what they do emit. This connector brings together different research topics with the common goal to investigate quantitatively environments with extreme conditions in particle and astrophysics.