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Fall 2007  Astr 10  9/4  Lecture 1.5  
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"I love the planets in their course to trace; 
   To mark the comets speeding to the sun, 
Then launch into immeasurable space, 
   Where, lost to human sight, remote they run."
--T. Rodd

TODAY: DANCE OF THE WANDERERS
Quiz 2: 1:00-1:15 PM
     **PLEASE SIT IN EVERY OTHER SEAT**
     USE YOUR OWN UNIQUE 4-DIGIT P.I.N.
In-class activity 5 (*.pdf)
     Find and sit in your assigned groups
     Turn in group worksheet
Prograde and retrograde motions
Ptolemy versus Copernicus
Models of planetary motion (*.pdf)
Epicycle demonstrator (*.js)
     (Syracuse University, 6, 1, 1/10, or 6, 1, 1/2)
Carousel Teacup Epicycle (*.mov)
     (K Street Mall, Sacramento, CA)
Retrograde demonstrator (*.js)