Lecture2 - Lecture 2 January 20, 2012 Introduction to...

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Lecture 2 January 20, 2012 Introduction to structure in the universe and the properties of stars.
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News Undergraduate talks by astro faculty candidates Noon – 1 PM (free pizza and soda); Serin 401 Undergraduates can earn extra credit by handing in a 1-2 paragraph evaluation of the clarity & interest of each talk. Tuesday 24 January (UG’s attend this lecture) Dr. Michael Kuhlen (UC Berkeley) The Milky Way as a Dark Matter Laboratory Thursday 26 January Dr. Alyson Brooks (University of Wisconsin) Big Bang Nucleosynthesis
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The Sun – a (fairly) typical star Atypical feature: is very close Mean distance: astronomical unit (AU) = semi- major axis of Earth’s orbit = 1.496 × 10 11 m Today the size of the AU is determined by timing of spacecraft telemetry and of radar signals reflected from planets: 1.495 978 707 00(3) × 10 m. (IAU Working Group: Numerical Standards for Fundamental Astronomy) 206,265 AU = 1 parsec, a typical separation of stars in the solar neighborhood
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Sun Angular diameter: Θ
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This note was uploaded on 02/06/2012 for the course PHYSICS 441/541 taught by Professor Pryor during the Spring '12 term at Rutgers.

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Lecture2 - Lecture 2 January 20, 2012 Introduction to...

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