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ThCATZQNDL. ThCACKNY17. ThCAKQETTO. Moon Phases. Moon Phases / Lunar Phases Explained. Have you ever wondered what causes the moon phases? We all know that its appearance changes over time. But why? The good way to understand the phases of the moon is to examine an earth-moon-sun diagram: ©MoonConnection.com All Rights Reserved. Diagram Explanation The illustration may look a little complex at first, but it's easy to explain. Sunlight is shown coming in from the right. One important thing to notice is that exactly one half of the moon is always illuminated by the sun.
So the basic explanation is that the lunar phases are created by changing angles (relative positions) of the earth, the moon and the sun, as the moon orbits the earth. If you'd like to examine the phases of the moon more closely, via computer software, you may be interested in this moon phases calendar software. Moon Phases Simplified It's probably easiest to understand the moon cycle in this order: new moon and full moon, first quarter and third quarter, and the phases in between.
The Moon's Orbit Moon Software. Moon Phases. Moon Phases Calendar / Moon Schedule.