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lecture3 - ASTRO ASTRO1 HughONeill [email protected]

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ASTRO 1
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Hugh O’Neill [email protected] office hours in Broida 6306: Thursday 12:30 3:30 pm or by appointment or anytime I happen to be in my office
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Your Grade 20% Homework 15% Midterm 1 93 100% A 90 93% A 15% Midterm 2 50% Final Exam 87 90% B+ 83 87% B 80 83% B 3% extra credit 80 83% 77 80% C+ 73 77% C iClicker paticipation 70 73% C 67 70% D+ 63 67% D 60 63% D 0 60% F
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Homework and Midterm 1 Homework 1 (chapter 1) due today @ 4pm Homework 1 (chapter 1) due today @ 4pm. Homework 2 (chapters 2 and 3) will be posted today and is due on Friday January 18. Homework 3 (chapters 4 and 5) will be posted next week and will be due on Friday January 25. Midterm 1 is on Wednesday January 30
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Astronomy 1 Winter 2013 Homework
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Units of Angle = π = = = = = =
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Small Angle Approximation α = * This version of the small angle approximation is only valid if the angle is expressed in radians = π α = = α× = α
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Small Angle Approximation If the angle is expressed in arcseconds, then the small angle approximation becomes 206,265 d D α = since 1( ) 206,265(
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