CHAPTER 2

What did Galileo do at the leaning Tower of Pisa? P 20

What did he do in the church? P. 21, 22

What five things did he discover with his telescope? P 22

Why were these findings important? P 22

How did the Catholic Church respond to Galileo’s discoveries? P 22, 23

What happened to Bruno in 1600 for insisting that "there were innumerable suns…" p 24

Think about why the new theories were disturbing.

What do Newton’s laws allow astronomers to predict? p 26

What was the paradox of Newton’s theory of gravity? P 26 

What did Newton propose as a way to avoid the paradox? P

What was wrong with this "solution?" p 27

What simple observation disproves an infinite universe? P 27

What is Olber’s Paradox? P 28

How did Edgar Allen Poe solve the paradox? P 28

What does special relativity show? P 30, 31

How is Einstein’s view of gravity different than Newton’s? p 31

How was Einstein’s theory first verified? P 34

Skip p 38, 39, 40.

Why did Einstein think that the universe wasn’t expanding? P 41