流星和星团
(原标题: The Meteor and the Star Cluster)
2025-08-25
浏览次数: 1562
有时候连天空都让你吃惊。为了在昴宿星团（M45）中看到更多的恒星和暗淡的星云，需要进行长时间的曝光。很多时候，一些不太有趣的东西出现在照片上，而这些东西并不是有意的——但后来被删掉了。这些包括卡住的像素、宇宙射线撞击、有明亮云层或地球月球的画面、飞机轨迹、镜头耀斑、微弱的卫星轨迹，甚至昆虫轨迹。然而，有时候，一些真正有趣的东西是偶然发现的。几周前，在沙特阿拉伯的al-Ula，一颗明亮的流星在昴星团长达一小时的曝光中划过。伴随着著名的明亮的蓝色恒星，不太知名和不太明亮的蓝色恒星，以及围绕星团的蓝色反射尘埃，快速的岩石碎片产生了独特的绿光，可能是由于蒸发的金属。拼图宇宙：每日天文谜题
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Sometimes even the sky surprises you. To see more stars and faint nebulosity in the Pleiades star cluster (M45), long exposures are made. Many times, less interesting items appear on the exposures that were not intended -- but later edited out. These include stuck pixels, cosmic ray hits, frames with bright clouds or Earth's Moon, airplane trails, lens flares, faint satellite trails, and even insect trails. Sometimes, though, something really interesting is caught by chance. That was just the case a few weeks ago in al-Ula, Saudi Arabia when a bright meteor streaked across during an hour-long exposure of the Pleiades. Along with the famous bright blue stars, less famous and less bright blue stars, and blue-reflecting dust surrounding the star cluster, the fast rock fragment created a distinctive green glow, likely due to vaporized metals. Jigsaw Universe: Astronomy Puzzle of the Day
© Yousif Alqasimi & Essa Al Jasmi