Copyright:Göran Strand
原文:
Two pictures captured on April 1 are combined in this creative day and night composite. Separated in time by about 10 hours the images otherwise match, looking along the coast at Östersund Sweden. The relative times were chosen to show the Sun and a nearly full Moon at the same place in the cold, early springtime sky. In the night scene Jupiter also shines above the waterfront lights, while Sun and Moon are both surrounded by a beautiful circular ice halo. The Sun and Moon halos really do align, each with an angular radius of 22 degrees. That radius is a constant, not determined by the brightness of Sun or Moon but only by the hexagonal geometry of atmospheric ice crystals and the reflection and refraction of light. Of course tomorrow, April 4, will find the Sun and Moon on opposite sides of planet Earth for a total lunar eclipse.
中文翻譯:
兩幅於4月1日拍攝的圖片結合成這幅創意的白天與黑夜合成影像。這些圖片在時間上相隔大約10小時,卻在視覺上完美對應,展現了瑞典厄斯特松德沿海的景觀。之所以選擇這樣的相對時間,是為了同時展示太陽和幾乎滿月在寒冷的早春天空中的美麗畫面。在夜景中,木星也在沿著海岸的燈光上方閃耀,而太陽和月亮周圍則都有著美麗的 circular ice halo。這些太陽和月亮的光環確實對齊,每個的角半徑為22度。這個半徑是一個常數,並非由於太陽或月亮的亮度,而是由於冰晶的六邊形幾何結構以及光的反射和折射導致的。當然,明天4月4日,太陽和月亮將會在地球的兩側,迎來一次全月食的奇觀。
#Östersund #瑞典 #白天與黑夜 #冰環 #太陽 #月亮 #木星 #全月食 #創意合成 #自然奇觀
來源:NASA每日圖片