Part III: Working with the Lunar Phase Simulator
The items below will help familiarize yourself with the controls and usability features of
the simulator.
• If you have not already done so, launch the NAAP Lunar Phase Simulator
• The main panel has sunlight, the earth, and moon. The earth and moon can be
dragged with the mouse.
• Below the main panel, there are animation controls. The moon and earth can be
dragged.
• The increment buttons move both the moon and earth by the specified time.
• The Moon Phase panel shows the current moon phase. Drop down menus will
jump to a predefined position. Note that the phases, such as crescent and gibbous,
are more broad than the particular point chosen by the presets.
• The Horizon Diagram panel displays the point of view of the observer (and you
are a second observer looking down on that observer).
• The observer’s horizon diagram can be dragged to allow for the most convenient
viewing orientation.
• The sun and moon on the globe can be dragged around.
• In the Diagram Options panel, the show angle option shows the earth-moon-sun
angle. The phases are technically defined in terms of this angle.
• In the Diagram Options panel, the show lunar landmark option draws a point of
reference to more easily observer lunar rotation and revolution.
• In the Diagram Options panel, the show time tickmarks option displays the time
of day of the observer
Part III: Working with the Lunar Phase SimulatorThe items below will help familiarize yourself with the controls and usability features ofthe simulator.• If you have not already done so, launch the NAAP Lunar Phase Simulator• The main panel has sunlight, the earth, and moon. The earth and moon can bedragged with the mouse.• Below the main panel, there are animation controls. The moon and earth can bedragged.• The increment buttons move both the moon and earth by the specified time.• The Moon Phase panel shows the current moon phase. Drop down menus willjump to a predefined position. Note that the phases, such as crescent and gibbous,are more broad than the particular point chosen by the presets.• The Horizon Diagram panel displays the point of view of the observer (and youare a second observer looking down on that observer).• The observer’s horizon diagram can be dragged to allow for the most convenientviewing orientation.• The sun and moon on the globe can be dragged around.• In the Diagram Options panel, the show angle option shows the earth-moon-sunangle. The phases are technically defined in terms of this angle.• In the Diagram Options panel, the show lunar landmark option draws a point ofreference to more easily observer lunar rotation and revolution.• In the Diagram Options panel, the show time tickmarks option displays the timeof day of the observer
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