article: Cosmology
links: Andromeda galaxy Renaissance String theory Age of the universe Royal Astronomical Society NASA Outer space Inflation (cosmology) Albert Einstein Speed of light Belgium Saturn (planet) Cepheid variable Age of the Universe Big Bang Planck (spacecraft) Sloan Digital Sky Survey General relativity Electromagnetic radiation Earth science Discovery doctrine Edwin Hubble Arno Allan Penzias Dark energy Robert Wilson Paradigm Shift Milky Way Red shift Mass Georges Lemaître Gravity Dark matter 1915