Copyright:José J. Chambó
原文:
A new year’s treat for binoculars, as 2016 begins Comet Catalina (C/2013 US10) now sweeps through planet Earth’s predawn skies near bright Arcturus, alpha star of Bootes. But this telescopic mosaic from December 21 follows the pretty tails of the comet across a field of view as wide as 10 full moons. The smattering of distant galaxies and faint stars in the background are in the constellation Virgo. Trailing behind the comet’s orbit, Catalina’s dust tail fans out below and left in the frame. Its ion tail is angled toward the top right, away from the Sun and buffeted by the solar wind. On January 17, the outward bound visitor from the Oort Cloud will make its closest approach to Earth, a mere 110 million kilometers away, seen near bright stars along the handle of the Big Dipper.
中文翻譯:
🎉 新年賀禮給望遠鏡，2016年開始時，彗星Catalina (C/2013 US10) 正在黎明的天空中掠過亮星Arcturus，獨眼巨人的亮星。這幅來自12月21日的望遠鏡馬賽克圖像，展示了彗星一條條迷人的尾巴，範圍廣達10個滿月的視野。背景中的遙遠星系和微弱星星位於處女座。彗星的塵埃尾巴在畫面左下方擴展，而它的離子尾巴則向右上方傾斜，背離太陽並受太陽風影響。1月17日，這顆來自奧特雲的訪客將以1.1億公里的距離靠近地球，當時將會在北斗七星的柄旁看見亮星。
#彗星Catalina #C2013US10 #Arcturus #天文觀察 #星空 #望遠鏡 #奧特雲 #新年祝福 #探索太空 #地球接近 #星星 #星系 #處女座
來源:NASA每日圖片
