近地轨道空间站
(原标题: Space Stations in Low Earth Orbit)
2023-01-07
浏览次数: 17
1月3日，两个在近地轨道上被阳光照亮的空间站穿过了黎明前的黑暗天空。从西到东（从左到右）穿过合成的延时图像，中国天宫空间站追踪了在当地日出前一个多小时拍摄的上部轨迹。在满天星斗的背景下，天宫正好经过大熊座倒转的北斗七星的下方，靠近它明亮弧线的顶点，在北极星的上方。但不到五分钟前，国际空间站在黑暗的天空中划出了自己的阳光条纹。它的轨迹开始于北地平线附近仙后座明亮恒星勾勒出的w形上方。引人注目的前景横跨葡萄牙东南部阿查达多加莫的一个废弃矿井。
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On January 3, two space stations already illuminated by sunlight in low Earth orbit crossed this dark predawn sky. Moving west to east (left to right) across the composited timelapse image China's Tiangong Space Station traced the upper trail captured more than an hour before the local sunrise. Seen against a starry background Tiangong passes just below the inverted Big Dipper asterism of Ursa Major near the peak of its bright arc, and above north pole star Polaris. But less than five minutes before, the International Space Station had traced its own sunlit streak across the dark sky. Its trail begins just above the W-shape outlined by the bright stars of Cassiopeia near the northern horizon. The dramatic foreground spans an abandoned mine at Achada do Gamo in southeastern Portugal.
© Zarcos Palma