扎根于旋转行星

2022年7月8日

Roots on a Rotating Planet
Image Credit & Copyright: Marcella Giulia Pace

Explanation: With roots on a rotating planet, an old tree is centered in this sequence of 137 exposures each 20 seconds long, recorded one night from northern Sicily. Digital camera and fisheye lens were fixed to a tripod to capture the dramatic timelapse, so the stars trailed through the region’s dark sky. Of course that makes it easy to spot the planet’s north celestial pole. The extension of Earth’s axis of rotation into space is toward the upper left, at the center of the concentric star trail arcs. The Milky Way is there too. The plane of our galaxy stretches across the wide field of view from north to east (left to right) creating a broader luminous band of diffuse starlight.

Tomorrow’s picture: light-weekend

扎根于旋转行星
影像提供与版权: Marcella Giulia Pace

说明: 这幅摄于西西里岛北部某夜晚，由137张20秒长曝光序列照片所组成的影像，其中心是一棵植根于旋转行星的老树。在这幅精采、由固定在三脚架搭配鱼眼镜头的数位相机所拍摄的缩时系列影像里，恒星在此地的幽暗夜空中曳出迹线。也因此，地球的北天极轻易可辨。很明显的，地球的自转轴从左上角的同心恒星迹线弧之中心向太空伸展。银河当然也没缺席。我们所在的星系之中央盘面，从北到东（从左到右）横贯广袤的视野，形成一道由星光聚成的宽广弥漫光带。

明日的图片: light-weekend