Moon Phases Simulation

							         Moon Phases Simulation
              We will observe the Sun and Moon
            every few days right around sunset time.


1. Sketch the shape of the Moon in each view.
2. Measure separation of Sun and Moon in “finger-widths”
3. Record that separation by the sketched shape.



       Imagine the horizon in these pictures extending all the
       way from one side of the sky to the other, east to west.



East                         South                          West
       Day 1




               Sun


East   South   West
       Day 3




East   South   West
       Day 5




East   South   West
       Day 8




East   South   West
       Day 12




East    South   West
                 Day 12
We are about to go 3 days more: to Day 15.
• Will the Moon even be visible to us?
• Where do you think the Moon will be?




East              South                  West
       —> NIGHT 12 <—
         Imagine the Earth
         rotating, the sun sets,
         and the whole night
         now goes by in 12
         hours or so…




                                     8
East         South                 West
           Good morning!
              Day 13
  (Sun is now in the East: Sunrise)



Sun                                         Moon
       Measure separation of Sun and Moon



East              South                West
       Day 15




Sun




East    South   West
       Day 19




Sun




East    South   West
       Day 22




Sun




East    South   West