Lecture03 - Iclickers Please register your clickers at...

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Iclickers • Please register your clickers at iclicker.com – provide your first and last names – your Rutgers student ID number – your clicker number (under bar code on back of clicker) • You can re-register clickers as needed • You do not need to register again if you have done so previously for another course
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Previous Lecture – Stellar Motions • Parallax – fundamental distance measuring tool – periodic, 1 year – from Earth: p = 1 / d (p in arc-sec, d in pc) • Proper motion – secular motion across sky – μ = v t / 4.74 d (μ in arc-sec/yr, v t in km/sec, d in pc) • Solar motion – 20 km/s toward apex • Previous and future space missions
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Lecture Quizzes • Quizzes will cover previous lecture’s material • Bring your clicker to every class • All quiz answers must be your own. Discussing the question with others while the quiz is active is a violation of the University’s Academic Integrity policy. Penalties can be severe. • Quizzes are open-book; you may use a calculator
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Quiz Question 1 In Star Wars Han Solo brags that his spaceship made the Kessel run “in less than 12 parsecs”. What is wrong with this? A. Absolutely nothing B. Han is hitting on Princess Leia, which is socially unacceptable C. This would require traveling faster than the speed of light, which is impossible D. A parsec is a measure of distance, not time E. Han was bragging – everyone knows that it would take at least 30 parsecs for this trip.
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A certain star has an observed parallax of 1/2”. What is the distance to this star?
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This document was uploaded on 02/08/2011.

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Lecture03 - Iclickers Please register your clickers at...

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