Skip to: [content ] [navigation]


Let's combine our picture of the Moon moving along its orbit with its appearance (phase) and position in the sky.

Views of the movements of the Earth and Moon over a lunar month and of the Moon in the sky as viewed from Earth.
Left-facing arrow. Upwards-facing arrow. Right-facing arrow. Time since full moon: 
Speed: 


Use these figures to help yourself understand Example #5. The control panel will allow you to vary the speed (and even the direction) of the passage of time, or to step through the time sequence hour by hour.