Simulation Video: Muslim Moon Sightings (see Reference below)
The NAAP Lunar Phases Lab demonstrates how the earth-sun-moon geometry gives rise to the phases of the moon as seen from earth. A distant view of an observer looking down on earth as well as a perspective of an observer looking into the sky are used in the the simulator.
Details and resources for this lab – including demonstration guides, in-class worksheets, and technical documents – can be found on the instructor's page. Some resources are not available for all modules.
Lunar Phase Simulator
PLEASE NOTE: The above simulation is best viewed from a computer browser with the Adobe Shockwave Player plug-in. It may not be possible to be viewed from a Mobile Phone unless the phone browser has the relevant (iOS/Android) plug-in.