薩武德里亞星軌
Savudrija Star Trails

來源:Branko Nadj|發表日期:2025-06-05
薩武德里亞燈塔在伊斯特拉半島北端附近的海岸線上閃閃發光,構成了一幅完美的夜景。這座歷史悠久的燈塔建於 19 世紀初,是亞得里亞海上水手們的導航工具。不過,還有一個更古老的導航工具在天空中閃耀,那就是北極星,小熊星座的α星,也被稱為北極星。在這個場景中,北極星在北極附近形成了最短的亮弧,北極是地球自轉軸向太空的延伸。當然,北極星正好位於所有同心星軌的中心。這張合成圖是由 400 張曝光照片疊加而成的數碼照片,每張照片長 30 秒,拍攝時相機和三腳架固定在旋轉的行星上。
原文: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.
※ 本文由萌芽機器人自動轉貼自每日一天文圖(Astronomy Picture of the Day,APOD),原文為英文,正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理,內容僅供參考,若有任何錯誤之處還請見諒!
關於每日一天文圖:每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務,網站每天提供一張影像或圖片,並由天文學家撰寫扼要說明其特別之處。