Savudrija星径
(原标题: Savudrija Star Trails)
2025-06-05
浏览次数: 54
萨乌德里亚灯塔在伊斯特拉半岛北端附近的海岸上闪闪发光，这张构图良好的夜空。这座历史悠久的灯塔建于19世纪初，是亚得里亚海上水手的导航设备。但在天空中，还有一颗更古老的导航辅助星——北极星，它是小熊座的阿尔法星，也被称为北极星。在这幅图中，北极星在北天极附近形成了最短的明亮弧线，北天极是地球自转轴向太空的延伸。当然，北天极正好位于所有同心圆星迹的中心。这张合成图像是用相机和三脚架固定在一个旋转的行星上，通过400次曝光的数字叠加而成，每次曝光30秒。
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Savudrija lighthouse shines along the coast near the northern end of the Istrian peninsula in this well-composed night skyscape. A navigational aid for sailors on the Adriatic Sea, the historic lighthouse was constructed in the early 19th century. But an even older aid to navigation shines in the sky above, Polaris, alpha star of the constellation Ursa Minor and also known as the North Star. In this scene Polaris forms the shortest bright arc near the North Celestial Pole, the extension of Earth's axis of rotation into space. Of course, the North Celestial Pole lies exactly at the center of all the concentric startrails. The composite image is a digital stack of 400 exposures, each 30 seconds long, taken with camera and tripod fixed to a rotating planet.
© Branko Nadj