Lecture 17

Lecture 17 - oday (Weds.) in oday (Weds.) in Astro Astro 3...

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Unformatted text preview: oday (Weds.) in oday (Weds.) in Astro Astro 3 3 z Chapter 10 Measuring the Stars z Cell phones off now, please z Online quiz #6 covering chapters 10 and 11 due Monday by 10 p.m. z Note extra credit Weds. night planetarium shows at 7 p.m. and 8 p.m. telescope viewing http://www.astro.ucla.edu/planetarium/ Worksheet on class website z Note office hours 2:30-4 today Class #17 News Today (7-Nov-2007) Another solar system similar to our own with 5 planets: Notes from watching National Geographic channel Naked Science yesterday Kuiper belt (Pluto & Quaron, comets, etc) is pronounced Kyper, not Kweeper There is an interesting theory regarding the early solar system: 4.6 billion years ago solar system formed Originally as many as 20 planets 3.9 billion years ago, a late heavy bombardment produced the moon in a huge collision and shortly afterward its craters as well This might have arisen from a 2:1 orbital resonance between Jupiter and Saturn that drastically altered the orbits of Neptune and Uranus (interchange them even?) This kicked lots of outer asteroids (planets?) into the inner solar system, causing havoc and angst. Where we are going in Astro 3 9 The Solar System 9 The Sun All about Stars (chapters 10, 11, 12) (2 nd midterm covers chapters 6-11) Neutron stars and black holes (chapter 13) Our Milky Way galaxy, other galaxies (chapters 14, 15) Dark matter (chapter 16) Cosmology, the Big Bang (chapter 17) All about Stars: Chapters 10-12 Today (chapter 10): How do we know how far away the stars are?How do we know how far away the stars are?...
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Lecture 17 - oday (Weds.) in oday (Weds.) in Astro Astro 3...

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