Copyright:Greg Hogan
原文:
A crescent Moon and brilliant Venus met in predawn skies on December 7, a beautiful conjunction of planet Earth’s two brightest celestial beacons after the Sun. Harder to see but also on the scene was Comet Catalina (C/2013 US10). The fainter comet clearly sporting two tails, lunar night side, bright sunlit lunar crescent, and brilliant morning star, are all recorded here by combining short and long exposures of the same field of view. Pointing down and right, Catalina’s dust tail tends to trail behind the comet’s orbit. Its ion tail, angled toward the top left of the frame, is blowing away from the Sun. Discovered in 2013, the new visitor from the Oort cloud was closest to the Sun on November 15 and is now outbound, headed for its closest approach to Earth in mid-January. Watch: The Geminids
中文翻譯:
🌙 在12月7日，彎彎的月亮和明亮的金星在黎明前的天空中相遇，形成了地球上兩個最明亮的天體之間的美麗合相。雖然較難以看到，但卡塔利娜彗星 (Comet Catalina, C/2013 US10) 也在場。這張圖片中清晰可見的兩條尾巴以及月球的夜面、明亮的陽光照亮的月牙和耀眼的早晨之星，都是短曝光與長曝光相同視野的組合。指向右下方的卡塔利娜的塵埃尾巴正隨著彗星的軌道向後拖曳，而它的離子尾巴則角度指向左上方，正受到太陽的影響。這顆2013年發現的全新訪客來自奧爾特雲，於11月15日離太陽最近，現在正在外行星運行，並於1月中旬迎來與地球的最近接觸。
✨ 觀賞：雙子座流星雨
#月亮 #金星 #卡塔利娜彗星 #天文學 #流星雨 #黎明天空 #天文攝影 #宇宙奇觀 #星空追踪 #OortCloud
來源:NASA每日圖片
