Lecture16 - Big Bang, Black Holes No Holes, No Math...

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ig Bang, Black Big Bang, Black oles No Math Holes, No Math ASTR/PHYS 109 Dr. David Toback Evidence for the Big Bang Topic 3: The Cosmic Background Radiation Big Bang, Black Holes, No Math 1
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Prep for Today (Is now due) – L16 Reading: BBHNM 3 BBBHNM 13 Reading questions: hapter 3 Chapter 13 End-of-Chapter Quizzes: Chapter 11 Paper Stuff Paper 1: Misgraded? Let us know Paper 2 Calibrations: Wed 4PM in CPR Evidence for the Big Bang Topic 3: The Cosmic Background Radiation Big Bang, Black Holes, No Math 2 Paper 3: Will be assigned after we finish Chapter 12
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Paper 3 What is the evidence for the Big Bang? ow on CPR Now on CPR Same format as previous papers Make sure to read all the structions in CPR instructions in CPR Due 1 week after we finish this Evidence for the Big Bang Topic 3: The Cosmic Background Radiation Big Bang, Black Holes, No Math chapter 3
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Paper 3 Stuff Same format at Paper 2 Phase I: Optional f you want feedback you If you want feedback, you need to turn in a draft early n eLearning on eLearning Phase II: Due in CPR and turnitin.com hase III: All CPR stuff Evidence for the Big Bang Topic 3: The Cosmic Background Radiation Big Bang, Black Holes, No Math Phase III: All CPR stuff 4
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Overview Evidence for the Big Bang? Finished: The Exploding Universe Expanding Space-Time his Time: This Time: More evidence for a hot early Universe? Photons and Hydrogen in the Evidence for the Big Bang Topic 3: The Cosmic Background Radiation Big Bang, Black Holes, No Math 5 Universe
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Cosmic Background Radiation The Cosmic Background Radiation provides, perhaps, the most ompelling piece of evidence for compelling piece of evidence for the story of the Big Bang Unfortunately, it’s the hardest explain to the non- ientist to explain to the non scientist Radiation = Photons Evidence for the Big Bang Topic 3: The Cosmic Background Radiation Big Bang, Black Holes, No Math 6
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Two Different Pieces of Evidence When we look at the stuff in the niverse we see that Universe we see that 1. ~75% of the atoms are hydrogen, ~25% are helium and very little of everything else 2. Lots of photons uniformly distributed in Thermal Equilibrium at around 3 degrees Kelvin osmic Background Radiation Evidence for the Big Bang Topic 3: The Cosmic Background Radiation Big Bang, Black Holes, No Math 7 Cosmic Background Radiation
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Prelude to the Story To understand the cosmic background radiation we need to understand a little about the evolution of the Universe imilarly to understand the Similarly, to understand the evolution of the Universe we eed to understand about these need to understand about these photons everywhere in the Evidence for the Big Bang Topic 3: The Cosmic Background Radiation Big Bang, Black Holes, No Math 8 cosmos
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Outline A ridiculously brief history of me time The Early Universe and its Particles in Thermal Equilibrium Nuclei and atoms and their
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Lecture16 - Big Bang, Black Holes No Holes, No Math...

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