Physical Cosmology and Philosophy

anthropic principle argument assume assumption astronomers atoms big bang model big bang theory billion black hole Bondi boundary conditions causal cause claim collapse conservation constant Copernican Principle cosmic Cosmological Principle cosmologists cosmology cosmos creation density distance domain Earth Einstein electron energy epoch equations evidence evolution evolve example existence expanding universe expansion explain fact false vacuum fine-tuning finite fluctuations force fundamental gravitational gravitational collapse helium hydrogen idea infinite inflation inflationary instant isotropic large number laws light Lovell Mach's Principle main sequence mass matter multiple universes Narlikar nature nebulae neutron neutron stars nuclear observed occur origin oscillations particles past philosophical physical physicists planets possible postulate prediction present problem protons quantum theory quasars question reason recollapse red shift region relativistic relativity repulsion scalar field scale scientific scientists singularity space space-time stars steady-state theory structure suggest supposed temperature tion World Ensemble