Copyright:
Yousif Alqasimi &
Essa Al Jasmi
中文翻譯:
有時候，天空也會給你驚喜！例如，當天文學家想拍攝著名的昴宿星團（Pleiades）時，會使用長時間曝光的技術，希望能看到更多的星星和微弱的星雲。有時候，這些照片中會出現一些意外的東西，但這些意外的東西通常會被編輯掉，比如卡住的像素、宇宙射線的損傷、明亮雲層或地球的月亮、飛機的軌跡、鏡頭耀斑、微弱的衛星軌跡，甚至蟲子留下的痕跡。然而，有時候真的會偶然捕捉到一些非常有趣的東西！幾週前，在沙烏地阿拉伯的阿烏拉（al-Ula），一顆明亮的流星在昴宿星團的長時間曝光中劃過，瞬間飛過的岩石碎片帶來了獨特的綠色光芒，這可能是因為裡面的金屬被蒸發了。這一幕與那些著名的藍色星星，以及周圍的藍色反射塵埃共同編織出一幅絢爛的宇宙畫面！
原文:
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
來源:NASA每日圖片
