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Review2 - Exam 2 Preview An Example This is not a trivia...

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1 Exam 2: Preview • This is not a trivia quiz! You don ʼ t have to memorize little details such as dates or places of birth etc. I will test your understanding! What does that really mean? An Example: • Assume that you remember that Newton ʼ s theory of gravity invokes an “action-at-a-distance”. A trivial Q would be: Who came up with the idea that gravity acts like an “action-at-a-distance”? A non-trivial Q would be: What does Newton ʼ s “action-at-a-distance” theory of gravity imply for the speed with which gravitational disturbances are transmitted? Exam 2: How to prepare • Let ʼ s identify the key issues for each lecture (after Exam 1)! The History and Philosophy of Astronomy (Lecture 11: Galileo I) Instructor: Volker Bromm The University of Texas at Austin Department of Astronomy Signature Course UGS 303 (Fall 2009)
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2 What are the key issues? Galileo finds the correct laws of free-fall and of inertia (important later-on for Newton)! Galileo clearly establishes that the Laws of Nature are mathematical! (“The book of Nature is written in the language of mathematics!”) Galileo for the first time uses the newly-invented telescope for astronomy! Why was the telescope such a game-changer? Up to this point, astronomy only had a limited set of data, accessible to naked-eye observation! astronomers/philosophers just re-interpreted the same old stuff, over and over again! From now on, there would always be new stuff/data! This fueled the accelerated pace of discoveries in modern times! And there is no limit in sight The History and Philosophy of Astronomy (Lecture 12: Galileo II) Instructor: Volker Bromm The University of Texas at Austin Department of Astronomy Signature Course UGS 303 (Fall 2009) What are the key issues? Galileo ʼ s trial: Brute force suppressed scientific knowledge/truth! Q: Why did the Church do it? The Church, and Italy, paid a heavy price: No more important scientific discoveries in Italy for centuries!
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