This is a collection of lectures on topics in cosmology and elementary particles with emphasis on astrophysics. Delivered by prominent scientists, the lectures give up-to-date and comprehensive treatment of the areas covered. Contents:Pulsars: New Celestial Clocks (D Backer)Gravitation and Early Universe Cosmology (J Barrow)Large Scale Structure and Peculiar Motions in the Universe (R Giovanelli)Precision Tests of the Standard Model and Top Quark Physics (W Marciano)Abelian Instantons, Particle Physics and Cosmology (B Ovrut)Probing the Early Universe: Predictions and Tests (D Schramm)Phase Transitions in the Early Universe: Large Scale Structure and Baryogenesis (N Turok)Semionics: A Possible Theory of High Temperature Superconductivity (A Zee)Mapping the Galaxy Distribution in the Southern Hemisphere (L da Costa)Unified Description of Quark and Lepton Mass Matrices (E Ma) Readership: Cosmologists, astrophysicists and astronomists. keywords: