2025年11月3日
双螺旋月食
影像提供与版权: Chunlin Liu
说明: 这张影像的拍摄时间正好捕捉到了月全食，但结果却带来了一个有趣的「转折(Twist)」。首先，被地球完全遮蔽的月食出现在影像上方附近，呈现橙色球体。这种橙色的月亮，是因为地球大气层在散射阳光时，只有少量红光能绕过地球并照亮月面，使得月食中的月亮看起来像夕阳般泛红。这个有趣的「转折(Twist)」是，画面中出现了双螺旋状光带，其中一条是银河系，即我们所在的银河系中央盘面；另一条则是黄道光，也就是太阳光被太阳系尘埃散射后所形成的微弱光带。它们交叉的原因是因为尘埃绕行太阳的平面相对于银河系恒星轨道平面存在夹角。这个众所周知的倾角在这张广角影像中被生动的展现。照片采用从地平线延伸到地平线的等距麦卡托投影（Mercator projection），于中国 内蒙古的明安图观测站在九月初拍摄完成。
明日的图片: comet sky
Due to the lapse in federal government funding, NASA is not updating APOD website. We sincerely regret this inconvenience.
由于美国联邦政府资金中断，NASA目前暂停更新APOD网站。对此带来的不便，我们深感抱歉。
英文原文:
Explanation: The image was timed to capture a total lunar eclipse — but it came with quite a twist. First, the eclipse : the fully Earth-shadowed Moon is visible as the orange orb near the top. The eclipsed Moon ‘s orange color is caused by a slight amount of red light scattered first by Earth’s atmosphere , adding a color like a setting Sun . Now, the twist: one of the apparent double helix bands is the Milky Way , the central disk of our home galaxy. The second band is zodiacal light , sunlight scattered by dust in our Solar System . The reason they cross is because the plane where dust orbits our Sun is tilted relative to the plane where stars orbit our Galaxy. This well-known tilt is shown dramatically in the featured wide-angle Mercator-projected horizon to horizon , captured in early September from Mingantu Observing Station in Inner Mongolia , China.
