What is the Origin of the Universe?. What is the Fate of the Universe?. How Old is the Universe?. 1644: Dr. John Lightfoot, Vice Chancellor of Cambridge University, uses biblical genealogies to place the date of creation at September 21, 3298 BC at 9 AM (GMT?)By Leo
Theories of the Universe. Flat Earth Theory. Flat Earth Theory. Date: Ancient Times Scientists: Babylonians, Egyptians Theory Description: The world is a flat disk, not a sphereBy lorie
Random 1. Random 2. Random 3. Random 4. Random 5. 1pt. 1 pt. 1 pt. 1pt. 1 pt. 2 pt. 2 pt. 2pt. 2pt. 2 pt. 3 pt. 3 pt. 3 pt. 3 pt. 3 pt. 4 pt. 4 pt. 4pt. 4 pt. 4pt. 5pt. 5 pt. 5 pt. 5 pt. 5 pt. A universe that stops expanding only after an infiniteBy dunn
Expansion of the Universe. Natural consequence of the basic field equations of the General Theory of Relativity (GTR) When GTR was first developed in the 1920s, everyone thought the Universe was staticBy sbutler
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The Cosmological Principle. Viewed on sufficiently large distance scales, there are no preferred directions or preferred places in the Universe. Consequences of the Cosmological Principle. The twin pillars of Cosmology Cosmic homogeneity
The Cosmological Principle. On a large enough scale , the universe is both isotropic and homogeneous ISOTROPY: There is no preferred direction in space. (All directions are alike.)
Cosmological Assumptions. Homogeneity Isotropy Universality Cosmological Principle. Matter is distributed evenly throughout the universe on the largest scales (~ 300 Mpc). The universe looks the same no matter where you are. Again, this is on the largest scales.
Cosmology, lect. 3 Cosmological Principle & Friedmann-Lemaitre Equations. Einstein Field Equation. Cosmological Principle. A crucial aspect of any particular configuration is the geometry of spacetime: because Einstein’s General Relativity is a metric
The Anthropic Cosmological Principle: A Universe made for me?. Geraint F. Lewis Sydney Institute for Astronomy The University of Sydney. What is the “ Anthropic Principle”?. Universe. The Geocentric Universe. The Heliocentric Universe. Nicolaus Copernicus (1473-1543).
Cosmological Constant. Quantum Field Theory – I Shahnoor Habib Fall 2005. Outline. Introduction History of Cosmological Constant Role of in the history of universe Estimate of from QFT Estimate of from Observations Critique of non-zero vacuum energy Conclusion. Introduction.
Cosmological Leadership. Lindsey Pollock, Principal Houston Independent School District Garden Oaks Elementary Montessori Magnet with an emphasis on Environmental Sciences. Professional Journey. Private and Public school background Educational perspectives
Cosmological Distances. Intro Cosmology Short Course Lecture 3 Paul Stankus, ORNL. A. Riess American. Supernovae cosmology (1998). Two Modern Hubble Diagrams. Freedman, et al. Astrophys. J. 553 , 47 (2001). Riess, et al. (High-Z) Astron. J. 116 (1998). Generalize
baryons. Universe. QCD Spectral Functions and Dileptons. T. Hatsuda (RIKEN). bare quark. quark. quark. 5. 27. hadron. 68. 3. Cosmological constant. “Higgs” condensate. Englert-Brout, Higgs (1964). Einstein (1917). “Chiral” condensate. Nambu (1960). 3.
Cosmological Reionization. Nick Gnedin. Outline. The brief history of time What we know about reionization Reionization: ABC Data vs theory Conclusions. End of inflation: z=10 27 t=10 -36 s. Recombination: z=1089 t=379 kyr. Today: z=0 t=13.7 Gyr. neutral. ionized. ionized.