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NASA has various videos that describe the different phases of the moon.
These videos typically explain how the moon's appearance changes as it orbits the Earth, causing different amounts of its illuminated side to be visible from our perspective.
The phases include new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and waning crescent.
These phases occur due to the changing positions of the Earth, moon, and sun.
You can find these videos on NASA's official website or their YouTube channel.
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