The Classroom Astronomer Magazine - Fall 2011
Issue 9 of The Classroom Astronomer Magazine. Print 9.95, PDF 7.95. Both versions for $13.40
Articles: The Lunar Parallax and December's International Measure The Moon Night; Archimedes Updated - Give Me A Satellite And I'll Measure Earth's Mass; Using Galileoscopes to Duplicate Galileo's Solar Observations; Space for Math - Finding Exoplanets; The Solar System Ballet, or Chaos Can Be Fun!; Star Motions with Sky Simulators; plus the columns RAP Sheet of Astronomy, Fall Teachers Sky Planning Calendar, and Astronomical Teachniques.