NASA | Lunar Eclipse Essentials in 3D

The video explains the phases of the moon, which occur monthly, and the phenomenon of lunar eclipses, which happen twice a year. During a lunar eclipse, the moon passes through Earth's shadow, turning red due to atmospheric scattering of light. The process involves the moon moving through the penumbra and umbra, with the red color resulting from longer wavelengths reaching the moon. The eclipse is brief, lasting from minutes to hours.

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