Equinox by Juan Carlos Casado. This time-lapse image shows the rotation of the Earth from the vantage point of Ecuador on the day of the Equinox in 2010. As the sun passed overhead then sank into the west it burned a bright path across the middle of the sky in this long-exposure image. Then, as the sky darkened, the stars became visible, the Earth’s spin making them trace their own circular paths about the north and south celestial poles
春分/摄影师Juan Carlos Casado。这张拍摄于厄瓜多尔某处登高点的延时照片展示了地球在2010年春分时刻的旋转。太阳从头顶越过并渐渐西沉，它在天空中部留下了一条明亮的路径。随着天空慢慢变黑，恒星变得可见起来，地球的旋转使它们绕着南北天极留下了圆形轨迹。
Photograph: Juan Carlos Casado/The Royal Observatory
摄影：Juan Carlos Casado/英国皇家天文台
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