Cosmology Study Guide 16-17 PDF

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Cosmology Study Guide Big Bang Theory Steady state vs. big bang Scientists that found supporting evidence for big bang ● Einstein-general relativity, gravity bends space-time, causing galaxies to move apart over time, cosmological constant predicts dark energy ● LaMaitre-physics showing a universe starting at a single point is possible ● Hubble-galaxies exist beyond the milky way, redshift of galaxies show they are moving away, more distant galaxies moving faster, suggests a time when all galaxies must have once been together ● Dicke and Wilkinson-Princeton professor and doctoral student that hypothesized they could detect the CMBR ● Penzias and Wilson-Bell Labs physicists that accidentally discovered the CMBR ● Hoyle-big bang skeptic, said scientists needed to discover remnant energy from big bang Possible fates of the universe-accelerating, open, flat, closed, dependent on critical density. Dark matter makes up most of the mass of the universe Dark energy is causing the rate of expansion to increase Determining redshift and blueshift from spectra-use to interpret movement towards and away from observer. The universe is an estimated 13.7 billion years old based on recent data from WMAP satellite Use the equation cz=Hd to determine distance if other variables are known. Place the major milestones of the big bang in chronological order. Recognize examples and/or descriptions of the three types of spectra.

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