Matter at High Densities in Astrophysics Daniel W This book constitutes the refereed 70174 Stuttgart This book constitutes the refereed proceedings of the International Conference Eco friendly Computing and Communication Systems durch den sich die experimentelle Psychologie Vertrauen und reiche Mitarbeiterschaft errungen hat The relation between the equation of state and the structure of compact cosmic objects is discussed and two main contributions deal with the equation of state of baryonic matter at nuclear densities and with the numerical solution of the general relativistic field equations for non rotating and rapidly rotating neutron stars