Lecture23 - Big Bang, Black Holes, No Math No ASTR/PHYS 109...

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Big Bang, Black oles No Math Holes, No Math STR/PHYS 109 ASTR/PHYS 109 r David Toback Dr. David Toback ectures 2 & 23 Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 1 Lectures 22 & 23
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Prep for Today (Is now due) – L23 Reading: BBBHNM 18 HNM Reading questions: Chapter 18 End-of-Chapter Quizzes: Chapter 16 hapt r 6 Paper Stuff Paper 2: Misgraded? Let us know Paper 3: Misgraded? Let us know. Revision due Monday before class. Want feedback? ue Friday for quick response Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 2 Due Friday for quick response Paper 4: Will be assigned when we start Chapter 17
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nnouncement Announcement before we begin Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 3
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Unit 5: Big Objects 1.Galaxy Formation 2.Star Birth and Death 3.More on Black Today Holes Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 4
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Where are we now in the history? A billion years after the bang stars start forming Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 5
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Outline What makes Black Holes black What a black hole would look like to a nearby observer Evidence for Black Holes Different types of Black Holes few words on why black holes A few words on why black holes are so important in cosmology nd our understanding of the Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 6 and our understanding of the Big Bang
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Moving Towards Black Holes If the neutron star has a “critical mass” (about 3M Sun ) it can continue to collapse Nothing strong enough to oppose e crush of gravity! the crush of gravity! Continues to collapse until it ecomes a single point in space becomes a single point in space Call this a Black Hole Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 7
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Why do we call it a black hole? all it a Black Call it a Black ole because light Hole because light can’t “escape” ay more about Say more about what this means Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 8
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The Sun in Space-Time The size of the Sun… Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 9
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Compressing the Sun What if we Far outside e Sun you compressed the Sun the Sun you can’t really ll the into a Neutron Star? tell the difference You can tell the difference if you are very close to the Sun itself Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 10 The sun is now a few kilometers across
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Compress the Sun into a Black Hole Again, far outside the outs de the Sun you can’t really tell the difference, ut you can but you can very close the Sun to the Sun itself nfinite curvature Big Objects and Black Holes Topic 3: Properties of Black Holes Big Bang, Black Holes, No Math 11 Infinite curvature
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This note was uploaded on 01/06/2012 for the course PHYS 109 taught by Professor Davidtoback during the Fall '11 term at Texas A&M.

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Lecture23 - Big Bang, Black Holes, No Math No ASTR/PHYS 109...

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