Tracking Twilight: 'Purple Sunset Effect' Seen Worldwide

Has twilight looked at little... mauve to you as of late? The effect is subtle, but noticeable on a clear evening. Sunsets are always colorful events, as the Sun's rays shine through a thicker layer of the atmosphere at an oblique angle, scattering out at longer, redder wavelengths. The post Tracking Twilight: ‘Purple Sunset Effect’ Seen Worldwide appeared first on Universe Today.