台北上空的8字曲线
(原标题: Analemma over Taipei)
2022-06-21
浏览次数: 15
太阳是不是每天都回到天空的同一地点？否。对于这个问题，一个更好、更直观的答案是8字曲线，它是一年中在同一时间、同一地点拍摄的图像的合成图。这张八字曲线是在2021年台湾许多个下午的下午4:30绘制的，前景是台北的城市天际线，包括高大的台北101。太阳在12月的位置——在12月至日——显示在最左边，而在6月至日的位置显示在最右边。还显示了太阳在一天中其余时间在至点和春分的位置。今天是2022年的6月至日，这是地球北半球太阳在天空中停留时间最长的一天。在许多国家，今天标志着一个新季节的正式开始，例如地球南半球的冬天。
查看原文解释
Does the Sun return to the same spot on the sky every day? No. A better and more visual answer to that question is an analemma, a composite of images taken at the same time and from the same place over the course of a year. The featured analemma was compiled at 4:30 pm many afternoons from Taiwan during 2021, with the city skyline of Taipei in the foreground, including tall Taipei 101. The Sun's location in December -- at the December solstice -- is shown on the far left, while its location at the June solstice is captured on the far right. Also shown are the positions of the Sun throughout the rest of the day on the solstices and equinoxes. Today is the June solstice of 2022, the day in Earth's northern hemisphere when the Sun spends the longest time in the sky. In many countries, today marks the official beginning of a new season, for example winter in Earth's southern hemisphere.
© Meiying Lee