Discovery of the Expanding Universe

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Discovery of the Expanding Universe Copy Discovery of the Expanding Universe 1929 Edwin Hubble estimated the distance to 46 Galaxies. Discovered all galaxies were red-shifted This means they were all moving away from earth The furthest away were moving the fastest…the closest galaxies were moving slower This became known as HUBBLES LAW

Determining the Beginning of Time Copy Determining the Beginning of Time Origin of Matter Big Bang theory 15-20 billion years ago Universe is expanding therefore it must have started off small and dense Echos of the Big Bang 1960 microwave antenna kept detecting background noise Picking up radiation given off by original Big Bang event