Cosmology, Big - Bang, galaxies, Theoretical underpinnings, As it stands today, the Big Bang is dependent on three assumptions, The universality of physical laws , The cosmological principle , The Copernican principle, Observational evidence, Hubble's law expansion, The horizon problem, Magnetic monopoles, Baryon asymmetry, Globular cluster age, Dark matter, Dark energy, Chaotic Inflation, Abundance of primordial elements. Big Bang nucleosynthesis, Flatness, Cosmic microwave background radiation, The future according to the Big Bang theory, Galactic evolution and distribution, Large-scale structure of the cosmos, Gravitational Lenses, Milky Way, The Sun's place in the Milky Way, Galaxy Types, Star Cluster.

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