太阳系的行星轨迹
(原标题: The Solar System's Planet Trails)
2022-07-01
浏览次数: 18
在这张明信片上，一颗旋转的行星上的星星在晴朗的早晨划过天空。6月24日，在中国北京紫禁城附近，相机固定在三脚架上，连续曝光近三个小时，拍摄了这张延时图像。在一系列的曝光开始后，一轮渐弱的新月在东方地平线上划出弧形，留下了最亮的条纹和水样的反射。在那一天，太阳系的行星也沿着黄道排列，在日出前留下自己的轨迹。土星在那天早上第一个升起，这颗带光环的行星的轨迹开始接近右上方边缘，几乎在画面之外。然而，最里面的行星水星只是在太阳升起之前升起。它留下了最短的痕迹，在最左边地平线附近的暮色中清晰可见。天王星和海王星是微弱的，很难找到，但在恒星轨迹中，太阳系的行星轨迹都被标记在场景中。
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Stars trail through a clear morning sky in this postcard from a rotating planet. The timelapse image is constructed from consecutive exposures made over nearly three hours with a camera fixed to a tripod beside the Forbidden City in Beijing, China on June 24. Arcing above the eastern horizon after the series of exposures began, a waning crescent Moon left the brightest streak and watery reflection. On that date the planets of the Solar System were also lined up along the ecliptic and left their own trails before sunrise. Saturn was first to rise on that morning and the ringed planet's trail starts close to the top right edge, almost out of the frame. Innermost planet Mercury rose only just before the Sun though. It left the shortest trail, visible against the twilight near the horizon at the far left. Uranus and Neptune are faint and hard to find, but mingled with the star trails the Solar System's planet trails are all labeled in the scene.
© Zheng Zhi