![]() Then, the corona comes into better view, and careful viewers can observe details such as loops and arcs that indicate the sun's magnetic fields. When totality starts, the chromosphere - the thin middle of the solar atmosphere - briefly becomes visible as a red arc. In the 30 seconds before totality, viewers will get the first glimpse of the solar corona, the outer atmosphere of the sun, and strange sights such as Baily's beads and the diamond ring, as points of light remain on the edge of the moon. You may see undulating ripples of darkness and light called shadow bands appear on buildings. As the sunlight dims and darkness sets in, clouds on the horizon will go dark, as the lunar shadow sweeps over them. In the 15 minutes prior to totality, as more than half of the sun is covered, daylight becomes noticeably dimmer, takes on an odd tint, with shadows becoming sharper and more detailed. According to the American Astronomical Society, total solar eclipses cause a host of wonderfully bizarre phenomena.
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