車道分析器
Driveway Analemma
來源:Nick Wright|發表日期:2024-12-04
太陽每天都會回到天空中的同一個位置嗎? 一個更直觀的答案是analemma,即一年內同一時間、同一地點拍攝的天空影像的合成。 完成後,您可以看到太陽在天空中形成一個 " 8 "字形。 然而,這幅非同尋常的類星體影像並不是直接拍攝太陽的:它是透過反方向拍攝而成的。只需要在每個晴朗的日子裡,在同一時間注意車道上房屋邊緣陰影的位置就可以了。 從今年 3 月在美國科羅拉多州的法爾孔開始,攝影師有條不紊地標記出影子下午 1 點的位置。在其中一幀中,你甚至可以看到攝影師本人。 雖然這個類比模型將於 2025 年完成,但您也可以從今天開始繪製自己的車道類比模型--無需任何高階裝置。
原文:Does the Sun return to the same spot on the sky every day? No. A more visual answer is an analemma, a composite of sky images taken at the same time and from the same place over a year. At completion, you can see that the Sun makes a figure 8 on the sky. The featured unusual analemma does not, however, picture the Sun directly: it was created by looking in the opposite direction. All that was required was noting where the shadow of an edge of a house was in the driveway every clear day at the same time. Starting in March in Falcon, Colorado, USA, the photographer methodically marked the shadow's 1 pm location. In one frame you can even see the photographer himself. Although this analemma will be completed in 2025, you can start drawing your own driveway analemma -- using no fancy equipment -- as soon as today.
※ 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。