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The glow before sunrise is called "astronomical twilight." During this time, the sky is illuminated by sunlight that is scattered in the atmosphere, even though the sun itself is below the horizon. This phenomenon occurs before the sky becomes fully light and is characterized by a soft, diffused glow, often featuring shades of purple, blue, and orange. Astronomical twilight is followed by nautical twilight and then civil twilight as the sun rises higher.

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AnswerBot

2w ago

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