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UA - ASTR 170 - Study Guide - Midterm

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UA - ASTR 170 - Study Guide - Midterm

School: University of Arizona
Department: Physics
Course: The Physical Universe
Professor: Daniel Marrone
Term: Fall 2016
Tags: astronomy
Name: STUDY GUIDE FOR TEST 1
Description: CHAPTERS 1-5 OF WHAT WE HAVE DONE IN CLASS STUDY GUIDE FOR TEST 1
Uploaded: 09/19/2016
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background image Astronomy:   170B1   The   Physical   Universe 
Week   4   Study   Guide   for   Test   #1 
 
Chapter   1­2 
­ 
___1____  :   The   distant   light   can   travel   in   a   year   (10   trillion   kilometers)  ­  ___2____:     The   path   the   sun   traces   out   in   the   sky  ­The   tilt   of   the   Earth’s   axis   is   what   makes     ____3____.  ­  ___4____:     is   when   the   Moon   rotates   once   with   every   orbit.   (When   we   only   see   one   side   of   the   moon.)   
Phases   of   the   Moon   (below) 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
­The   phases   of   the   moon   are     ___5___  ,   Waxing   Crescent,   First   Quarter,     ___6___  ,   Full   Moon,   Waning  Gibbous,   Third   Quarter,     ___7___  ,   New   Moon.  ­  ___8___     eclipses   can   only   occur   when   the   moon   is   opposite   of   the   sun.   ­  ___9___     eclipses   only   occur   when   the   moon   is   on   the   same   side   of   the   Earth   as   the   sun.   
 
 
background image  
Chapter   3 
 
­ 
___1___:     When   it   looks   like   Mars   is   going   westward   instead   of   eastward   only   because   the   Earth   is  moving   so   quickly   past   it.   
 
 
 
 
 
 
 
­Ptolemy:    ­Ptolemy   stated   that     ___2___     were   required   to   approximate   retrograde   motion.  ­This   model   had   the   Earth   as   the   center   of   the   universe. 
­The   Ptolemaic   model   was   not   correct 
­Copernicus:  ­Continued   with   the   theory   of   epicycles   but   had   a   more   mathematically   grounded   model.  
­The   sun   was   at   rest   in   the   center   of   the   model   while   the   Earth   and   the   other   planets   orbited   around   it.  
­Tycho   Brahe:  ­Had   extremely   precise   measurements 
­His   model   had    
___3___     being   stationary   with   the   sun   orbiting   around   it.   And   the   other   planets   would  orbit   the   sun.   ­Kepler  ­Made   a   model   based   on   “Platonic   Solids” 
­Planets   move   on    
___4___  ,   not   circles.  ­His   mathematical   model   matches   Tycho’s   measurements. 
­ 
Kepler’s   Laws:   ­First   Law:   The   orbit   of   each   planet   around   the   sun   is   an   ellipse   with   the   sun   at   one   focus. 
­Second   Law:   As   a   planet   moves   around   its   orbit,   it   sweeps   out   equal   areas   in   equal   times. 
­Third   Law:   Orbits   obey   the   relationship   p^2=a^3,   p=orbital   period   in   years   and   a=average   distant   from 
the   sun   in   AU.   More   distant   planets   orbit   the   sun   at   slower   speeds. 
  ­___5___:  ­First   to   point   a   telescope   at 
astronomical   objects. 
­The   first   to   discover   mountain 
and   craters   on   the   moon   and 
sunspots   on   the   sun 
­Also   discovered   that   there   are 
moons   around   other   planets 
 

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School: University of Arizona
Department: Physics
Course: The Physical Universe
Professor: Daniel Marrone
Term: Fall 2016
Tags: astronomy
Name: STUDY GUIDE FOR TEST 1
Description: CHAPTERS 1-5 OF WHAT WE HAVE DONE IN CLASS STUDY GUIDE FOR TEST 1
Uploaded: 09/19/2016
4 Pages 40 Views 32 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
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