Transcript Lecture10
ASTR 1101-001 Spring 2008 Joel E. Tohline, Alumni Professor 247 Nicholson Hall [Slides from Lecture10] Exam #1 Results 'Exam #1 Grades' D's F's C's A's B's Exam #1 Results • Total score composed of two parts: – (g1) score on scalemodel homework assignment is 25% – (g2) score on in-class exam is 75% • Where to find scores: – g1 at bottom of exam – g2 at top-left of exam 'Exam #1 Grades' D's F's C's A's B's Example: g1 = 17/25; g2 = 23/27 grade = 25*g1 + 75*g2 = 89 Exam #1 Results • Total score composed of two parts: – (g1) score on scalemodel homework assignment is 25% – (g2) score on in-class exam is 75% • Where to find scores: – g1 at bottom of exam – g2 at top-left of exam 'Exam #1 Grades' D's F's C's A's B's Example: g1 = 17/25; g2 = 23/27 grade = 25*g1 + 75*g2 = 89 Exam #1 Results • Total score composed of two parts: – (g1) score on scalemodel homework assignment is 25% – (g2) score on in-class exam is 75% • Where to find scores: – g1 at bottom of exam – g2 at top-left of exam 'Exam #1 Grades' D's F's C's A's B's Example: g1 = 17/25; g2 = 23/27 grade = 25*g1 + 75*g2 = 89 Exam #1 Results • Total score composed of two parts: – (g1) score on scalemodel homework assignment is 25% – (g2) score on in-class exam is 75% • Where to find scores: – g1 at bottom of exam – g2 at top-left of exam 'Exam #1 Grades' D's F's C's A's B's Example: g1 = 17/25; g2 = 23/27 grade = 25*g1 + 75*g2 = 89 Begin Chapter 4 • Geocentric Model to Explain ‘apparent’ Motion of Celestial Objects – 24-hour rotation of celestial sphere (east-towest) to explain diurnal motion of stars – Slow (monthly and yearly) eastwardly motion of moon and sun due to the presumed orbit of these two objects about the Earth – Apparent motion of planets was more difficult to explain; throughout each year, they appear to wander back and forth with varying speed Begin Chapter 4 • Geocentric Model to Explain ‘apparent’ Motion of Celestial Objects – 24-hour rotation of celestial sphere (east-towest) to explain diurnal motion of stars – Slow (monthly and yearly) eastwardly motion of moon and sun due to the presumed orbit of these two objects about the Earth – Apparent motion of planets was more difficult to explain; throughout each year, they appear to wander back and forth with varying speed Begin Chapter 4 • Geocentric Model to Explain ‘apparent’ Motion of Celestial Objects – 24-hour rotation of celestial sphere (east-towest) to explain diurnal motion of stars – Slow (monthly and yearly) eastwardly motion of moon and sun due to the presumed orbit of these two objects about the Earth – Apparent motion of planets was more difficult to explain; throughout each year, they appear to wander back and forth with varying speed