I / The Contemporary Structure and Dynamics of the Universe.- Observational Foundations for Assumptions in Cosmology.- Intergalactic Gas.- Confrontation of Lemaître Models and the Cosmological Constant with Observations.- The Hubble Constant and the Deceleration Parameter.- Evidence for Non-Velocity Redshifts.- General Discussion and Short Contributions.- II / The Structure of the Universe.- Superclustering of Galaxies.- The Counts of Radio Sources.- Radio Source Counts at Centimetre Wavelengths.- Observational Foundations of Inhomogeneous Universe.- Field Galaxies and Cluster Galaxies: Abundances of Morphological Types and Corresponding Luminosity Functions.- III / Relic Radiation.- Energy Density of the Relic Radiation.- Large Scale Anisotropy of the Cosmic Microwave Background.- Fine Scale Anisotropy of the Cosmic Microwave Background Radiation.- The Thermal History of the Universe and the Spectrum of Relic Radiation.- The Spectrum of Density Perturbations in an Expanding Universe.- Cosmological Synthesis of the Elements.- IV / The Origin of Structure in the Expanding Universe.- The Formation of Galaxies in Friedmannian Universes.- Whirl Theory of the Origin of Galaxies and Clusters of Galaxies.- Generation of Sound from Primordial Cosmic Turbulence.- General Discussion and Short Contributions.- V / The Structure of Singularities.- General Solutions of the Equations of General Relativity near Singularities.- Singularities in Cosmology.- Isotropization of Homogeneous Cosmological Models.- The Anisotropy of the Universe at Large Times.- General Discussion and Short Contribution.- Large Number Coincidences and the Anthropic Principle in Cosmology.- Low Frequency Gravitational Waves in Cosmology.- VI / Matter-Antimatter Universes and Physical Processes Near theSingularity.- Quantum Descriptions of Singularities Leading to Pair Creation.- Creation of Particles in Cosmology.- Baryon Symmetric Big Bang Cosmology.- The Low Density Symmetric Cosmology.- Confrontation of Antimatter Cosmologies with Observational Data.- Short Contribution.- Concluding Remarks by M. J. Rees.- Vote of Thanks to Organisers by G. B. Field.- Index of Authors.- Index of Subjects.