As the Sun drops below the western horizon, Earth’s shadow climbs into view above the opposite horizon. It forms a dark blue-gray band that climbs higher as the evening progresses. It’s also visible in the dawn sky, shortly before sunrise.
As the Sun drops below the western horizon, Earth’s shadow climbs into view above the opposite horizon. It forms a dark blue-gray band that climbs higher as the evening progresses. It’s also visible in the dawn sky, shortly before sunrise.