Lecture13 - Astro Nova Star Count Challenge light pollution measurements now until March 8 http/www.globe.gov/GaN/_Family Zo robot mapper for Mars

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Astro Nova Star Count Challenge light pollution measurements now until March 8 http://www.globe.gov/GaN/GaN2008ActivityPacket_Family.pdf Zoë, robot mapper for Mars spectral measures for terrain type CMU project Mars orbiter sees avalanches ice falling down steep slopes Ulysses solar spacecraft failing running out of power losing communications, fuel freezing
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First Exam Tuesday March 11 5:00 pm – 6:20 pm Physics Lecture Hall Closed book and notes Computer-graded multiple-choice questions Material covered: Text chapters 5.3, 6.1, 6.2, 16 - 21 Lectures 1-14 (January 22 through March 6) Bring Student ID card and a #2 pencil Practice Exam on class web page
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Previous Lecture Possible models for Pulsars Pulsars as spinning magnetized neutron stars General Relativity Spacetime and geodesics Curvature by mass Classical tests Binary pulsar Black Holes Schwarzschild radius (aka event horizon) Tidal effects
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Quiz Question 1 A pulsar can be best understood as: A. A vibrating neutron star B. A rotating neutron star C. A vibrating white dwarf D. A rotating white dwarf E. All of the above
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Homework Question CQ 20.36 Describe what we would see if we watched an object fall toward a black hole. We would see the motion of the object slow as it approaches the event horizon. It would appear to hover just above the event horizon, but would quickly become redder and dimmer and disappear. Depending on the mass of the black hole, tidal forces may be so strong that the object is ripped apart as it approaches the event horizon.
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Homework Question CQ 20.38 What would happen to the distance of the Earth from
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Lecture13 - Astro Nova Star Count Challenge light pollution measurements now until March 8 http/www.globe.gov/GaN/_Family Zo robot mapper for Mars

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