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IN THE BEGINNING
THEORIES OF THE UNIVERSE
THE GREAT DEBATE
3 other sections not shown
alpha particles Alpher and Herman Andromeda Andromeda Galaxy appear arcseconds Aristarchus astronomers atoms Baade Big Bang model billion calculations carbon centre Cepheid Cepheid variable CMB radiation COBE Copernicus Copernicus's cosmic cosmological constant cosmologists cosmology cosmos created creation detect detector developed diagram discovery distance early universe Earth Earth-centred eclipse Eddington Einstein emitted energy epicycle eternal universe ether existence explain Fred Hoyle Friedmann galaxies Galileo Gamow Gold gravity helium Herschel Hoyle Hubble hydrogen Kepler Lemaitre Lemaitre's mathematical measurements microwave Milky Moon motion Mount Wilson moving nebulae neutrons Newton's nucleosynthesis nucleus observations Observatory orbit parallax Penzias and Wilson photographic physicists physics planets position predicted problem protons radio astronomy radio waves realised redshift result roughly Ryle scientific scientists seemed shift shown in Figure shows space speed of light static Steady State model stellar Sun-centred model telescope theory of relativity tion variable star variations velocity wavelengths