Chapter11 - Big Bang, Black Holes, No Math ASTR/PHYS 109...

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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 1 Big Bang, Black Holes, No Math ASTR/PHYS 109 Dr. David Toback Lectures 14 & 15
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 2 Prep for Today (Is now due) – L14 Reading: BBBHNM 11 Reading questions: Chapter 11 End-of-Chapter Quizzes: Chapter 9 Paper Stuff Paper 1 Revision: CPR due Fri 6PM Paper 2 Submission: Wed 4PM in CPR
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 3 Prep for Today (Is now due) – L15 Reading: BBBHNM 12 Reading questions: Chapter 12 End-of-Chapter Quizzes: Chapter 10 Paper Stuff Paper 1 Revision: CPR due Fri 6PM Paper 2 Submission: Was Wed 4PM in CPR
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 4 Overview Finished: The Exploding Universe This Time: Expansion of Space-Time and General Relativity After That: Photons and Hydrogen in the Universe
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 5 Outline General Relativity and Expanding Space-Time Expanding Space and Red-Shifts
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 6 Recapping the Data Galaxies are moving away from us, faster if they are further away AND moving the SAME WAY same way in ALL DIRECTIONS Simplest explanation: An explosion !
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 7 Is this right? What’s wrong with the simple explosion explanation? It’s consistent with all the data, but only if we’re at the center of the Universe and not moving
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 8 What if we Think about it Differently Maybe it just “looks” like we’re at the center of the Universe and not moving Could this be true? Could be, but what’s the reason it looks like we’re at the center?
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 9 Back to General Relativity Space-time can change E.g. Mass causes it to curve and stretch What if space-time is expanding ?
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 10 Balloon Example Can think of Space-Time like the SURFACE of a balloon Balloon is a two dimensional example/analogy There is no inside, space IS just the surface As space-time expands, the distance between any two spots increases, but there is no spot ON THE SURFACE that is the center of the expansion
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 11 Expanding Space http://bigbang.physics.tamu.edu/Figures/StolenAnimations/originredshifts2.swf
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Evidence for the Big Bang Topic 2: Expanding Space-Time Big Bang, Black Holes, No Math 12 The Expanding Universe It’s not just galaxies moving through space Space is expanding, carrying the galaxies along!
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Chapter11 - Big Bang, Black Holes, No Math ASTR/PHYS 109...

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