day_20 - October 20, 2010 Exam 3 This Friday, October 22....

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October 20, 2010 Exam 3 This Friday, October 22. Review Sheet posted. Review Thursday, 5 – 6 PM, RLM 4.102 (ground floor of RLM, south side). Reading Chapter 7, Chapter 8 - Sections 8.1, 8.2, 8.5, 8.6, 8.10, Chapter 9: 9.1 – 9.5.1 Astronomy in the News? UFOs over El Paso? Pic of the Day – 44 nights of Venus over Turkey
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Goals: To understand how Einstein taught us to think about space, time, and gravity. To understand what we mean by space. To understand how space can be curved.
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Route from JFK airport to Paris Orly. Is this a straight line?
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Invert balloon - 2 D embedding diagram of curved 3 D space around gravitating object Properties of this curved space that are preserved in the embedding diagram: C < 2 π r Sum of angles of triangle not equal 180º (can be > or <) Parallel lines diverge or cross Orbits around “cone”
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Figure 9.4 Straight lines in the 2D embedding diagram of curved, gravitating space.
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Goal: To understand what Einstein means by an orbit.
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day_20 - October 20, 2010 Exam 3 This Friday, October 22....

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