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    This study investigates the antitwilight phenomenon using various visual and theoretical methods. It explains the distinct horizontal bands observed opposite the Sun, including the Belt of Venus, based on atmospheric conditions.

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    Area of Science:

    • Atmospheric optics
    • Optical phenomena
    • Astronomical observations

    Background:

    • Antitwilight, the illumination opposite the Sun, is a complex optical phenomenon.
    • Understanding its features requires detailed analysis of atmospheric interactions with sunlight.

    Purpose of the Study:

    • To investigate the antitwilight phenomenon using diverse methodologies.
    • To identify and physically explain the distinct horizontal bands observed in the antitwilight.
    • To clarify the origins of specific antitwilight features, such as the dark segment and the Belt of Venus.

    Main Methods:

    • Utilized time-lapse videos, still photography, and visual observations.
    • Conducted theoretical studies, including ray tracing through the low atmosphere.
    • Measured colors, brightnesses, and features as a function of solar altitude.

    Main Results:

    • Identified four distinct horizontal bands within the antitwilight.
    • Explained these bands through atmospheric geometry, line-of-sight, optical depth, refraction, and multiple scattering.
    • Detailed the physical origins of the dark segment and the rising Belt of Venus.

    Conclusions:

    • Provided a comprehensive physical explanation for observed antitwilight bands.
    • Suggested new terminology for three of the four identified bands.
    • Reconciled new findings with previous research on twilight phenomena.