Summary of the video.
Lunar Phases and Earth's Orbit: The Moon's phases are a result of its revolution around the Earth, taking roughly 27 days to complete a cycle. The changing illumination of the Moon as seen from Earth is due to the relative positions of the Sun, Earth, and Moon.
• Moon Phase Progression: The lunar cycle begins with the New Moon, progressing through Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, and Waning Crescent before returning to the New Moon. Each phase corresponds to a specific angle and appearance of the illuminated portion of the Moon.
• Terminology and Alignment: Key terms like "waxing" (increasing illumination), "waning" (decreasing illumination), "crescent" (less than half illuminated), and "gibbous" (more than half illuminated) describe the Moon's appearance during its phases. The alignment of the Sun, Earth, and Moon dictates the phase, with the sun's light consistently illuminating from the right.
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