Lecture21

# Lecture21 - Big Bang Black 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 ecture 20 & 21 Massive Things: Galaxies, Stars and Black Holes Topic 2: Stars Big Bang, Black Holes, No Math 1 Lecture 20 & 21

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Prep for Today (Is now due) ±–L 2 1 Reading: BBBHNM 17 Reading questions: Chapter 17 End-of-Chapter Quizzes: Chapter 15 aper Stuff Paper Stuff Paper 2: Misgraded? Let us know. Revision reviews due Monday Paper 3: CPR due tonight Paper 4: will be assigned when we start Massive Things: Galaxies, Stars and Black Holes Topic 2: Stars Big Bang, Black Holes, No Math 2 Chapter 17
Unit 5: Big Objects 1. Galaxy Formation 2. Star Birth and Death ore on Black Hole Formation and Today 3. More on Black Hole Formation and Properties of Black Holes t turns out that the way Galaxies and It turns out that the way Galaxies and Stars form is very similar… start ere there The way stars “die” depends on the star itself… sometimes they die to form a Black Hole Massive Things: Galaxies, Stars and Black Holes Topic 2: Stars Big Bang, Black Holes, No Math 3

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Important Buzz Words Wanted to make sure we had a lecture where we explained some of the important buzz words in astronomy: ed Giants Red Giants Supernovae White Dwarfs Neutron Stars Black Holes Massive Things: Galaxies, Stars and Black Holes Topic 2: Stars Big Bang, Black Holes, No Math 4
Today’s Lecture A star is born Nuclear reactions and gravity keep stars alive and make them shine he life of stars: shining and The life of stars: shining and converting hydrogen into heavier elements ife and death of stars like our Sun Life and death of stars like our Sun Life and death of massive stars Massive Things: Galaxies, Stars and Black Holes Topic 2: Stars Big Bang, Black Holes, No Math 5

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The Story of Galaxy Formation After the Big Bang we just had lots of stuff floating round in space around in space After about a billion years ft r a ut a n y ar we have lots of atoms, aking the Universe making the Universe composed of neutral particles Massive Things: Galaxies, Stars and Black Holes Topic 2: Stars Big Bang, Black Holes, No Math 6
Where are we now in the history? few hundred million years after A few hundred million years after the bang, stars start forming Massive Things: Galaxies, Stars and Black Holes Topic 2: Stars Big Bang, Black Holes, No Math 7

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Stellar Clumps he galaxies start as giant The galaxies start as giant spinning areas of hydrogen and helium gas, kept together ecause of gravity because of gravity Eventually, local areas around the center of the galaxy also start clumping due to gravity Massive Things: Galaxies, Stars and Black Holes Topic 2: Stars Big Bang, Black Holes, No Math 8
Star Formation his is some This is some text. .

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Lecture21 - Big Bang Black Black Holes No Holes No Math...

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