The lectures presented deal with theories on the very early universe, capable of providing the initial conditions of the Friedmann model and of generating inhomogeneities in the inflationary period; modelling of the epoch of primordial nucleosynthesis. The properties of the cosmic microwave background are examined both its spectrum and the

The present volume discusses topics associated with the very early universe, primordial nucleosynthesis, big bang nucleosynthesis and light-element abundances, the microwave sky, and the large-scale structure of the universe. Attention is given to the origin of primordial cosmological perturbations, the thermal history of matter, the cosmic quark

Synthetic horizontal branch (HB) stars in globular clusters, when computed on the basis of HB evolutionary tracks and pulsation theory constraints, furnish the best theoretical scenarios for exploration of the age-metallicity relation in globular clusters. Preliminary results are presented from recently computed synthetic models of the horizontal

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