Lecture19 - 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 ecture 19 Big Objects and Black Holes Topic 1: Galaxy Formation Big Bang, Black Holes, No Math 1 Lecture 19
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Unit 5: Big Objects and Black Holes 1. Galaxy Formation Today 2. Star Birth and eath Death Black Hole Formation roperties of Black 3. Properties of Black Holes Big Objects and Black Holes Topic 1: Galaxy Formation Big Bang, Black Holes, No Math 3
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Overview It turns out that the way Galaxies and tars form is very similar start there Stars form is very similar… start there The way stars die depends on the star self sometimes they die to form a itself… sometimes they die to form a Black Hole lack Holes are some of the weirdest Black Holes are some of the weirdest things in the Universe… n many ways the formation of Black In many ways the formation of Black Holes is like the Big Bang in Reverse Big Objects and Black Holes Topic 1: Galaxy Formation Big Bang, Black Holes, No Math 4
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Various Times Walking through what happens during each of a number of different ach of a num r of ff r nt periods in time The VERY early universe hap 13 The first three Minutes The next 300,000 years hap 14 } Chap 13 The next billion years ~13 billion years later (now) } Chap 14 } Chaps 15-17 The ultimate fate of the universe? } Unit 6 Big Objects and Black Holes Topic 1: Galaxy Formation Big Bang, Black Holes, No Math 5
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A Big Bang Occurs… Then What? Universe goes through a phase of being hot and small, with lots of high nergy particles energy particles hen the Universe gets Then the Universe gets bigger and cooler Big Objects and Black Holes Topic 1: Galaxy Formation Big Bang, Black Holes, No Math 6 As it gets bigger, it evolves
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From the Early Universe to Galaxies After about ~3 minutes things are cool enough for nuclei to form After ~300,000 years ings are cool enough for things are cool enough for electrons and nuclei combine to form atoms Big Objects and Black Holes Topic 1: Galaxy Formation Big Bang, Black Holes, No Math 7
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The Transition From a Hot Universe to a Cool Universe me Time Some Time asses Passes Big Objects and Black Holes Topic 1: Galaxy Formation Big Bang, Black Holes, No Math 8
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Where are we now in the history? A billion years after the bang Big Objects and Black Holes Topic 1: Galaxy Formation Big Bang, Black Holes, No Math 9
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A Neutral Universe After the electrons and protons ombine to form atoms the Universe is combine to form atoms the Universe is almost completely neutral i.e., neutrally charged Why is this so important?All the particles in the Universe stop attracting each other due to their electric charge Not completely true, just true outside the atoms Basically can ignore electric charge Big Objects and Black Holes Topic 1: Galaxy Formation Big Bang, Black Holes, No Math 10 from here on out
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A Gravity Dominated Universe The only thing left is gravity!
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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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Lecture19 - Big Bang, Black Holes, No Math No ASTR/PHYS 109...

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