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GSU - PHYS 1010 - Class Notes - Week 4

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GSU - PHYS 1010 - Class Notes - Week 4

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background image Astronomy  1010  Homework  Set 3    
The  occasional  westward  (left  to right)  motion  of planets  across the celestial  sphere  is called:    a.)  retrograde  rotation 
b.)  retrograde  revolution 
c.)  retrograde  motion   (Galelio noticed,  or Tycho  ?) 
d.)  reverse  motion 
The  shape of  Mars’s orbit  around  the Sun  is  best described  as a(n):  a.)  ellipse   
b.)  circle 
c.)  hyperbola 
d.)  parabola 
The  Sun  is at one focus  of the  Earth’s  elliptical  orbit.   What  is  at the  other  focus?  Keplers  Law    a.)  our Moon 
b.)  Jupiter 
c.)  Venus 
d.)  nothing    
background image  
An  orbit  with  which  of  the following  eccentricities  is  most  circular?  a.)  0.10  
b.)  0.25 
c.)  0.72 
d.)  0.90 
In what  phase  is  Venus  closest  to the Earth?    a.)  new    
b.)  quarter  phase 
c.)  full 
d.)  gibbous  phase 
What  assumption  made  Copernicus’ heliocentric  cosmology  no more accurate  than  geocentric  cosmology? 
a.)  That  the  sidereal  period  is the  true  orbital  period  of  any  astronomical  body. 
b.)  That  the  synodic  period  is the  time  that  elapses  between  successive  identical 
configurations.  c.)  That  Mars and Venus  must  be closer  to the  Sun  than  is  the Earth. 
d.)  That  planets orbit  the Sun  along 
circular paths.     
However,  Copernicus’  model  of the  Solar  System  was superior  to the geocentric  model  because 
a.) it  had a mathematical  basis. 
b.) it was much  more  accurate. (proposed  sun, not earth, was center) 
c.) it  did  not require  epicycles.-   d.) it  fit  Tycho’s  data better.   
Galileo  observed  that  Jupiter  has  moons.   From this  information,  you  can  conclude  a.)  Jupiter  is the  center  of the  Solar  System.  b.)  Jupiter  orbits  the  Sun.   
c.)  Jupiter  orbits  the  Earth 
d.)  Some things  do not orbit  the Earth. 

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School: Georgia State University
Department: Physics
Course: Astronomy 87548 Lab
Professor: Ben McGimsey
Term: Fall 2016
Tags: astronomy and Physics
Name: AstronomyHw1AnswersExplanations.pdf
Description: This is corrected homework and note content...
Uploaded: 09/19/2016
6 Pages 16 Views 12 Unlocks
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