Copyright:
Victor Sabet &
Julien De Winter
中文翻譯:
在夜空中，有一顆名叫 Comet Lemmon 的彗星正在變得越來越明亮，它正朝著早晨的北方天空移動。除了 Comet SWAN25B 和 Comet ATLAS，現在 Comet C/2025 A6（Lemmon）也是第三顆可以用雙筒望遠鏡和長時間攝影曝光看見的彗星。這顆彗星是在今年早些時候被發現的，現在仍在向內太陽系前進。它將於11月8日繞過太陽，但在此之前，它將於10月21日達到與地球最近的距離，距離約為地球和太陽距離的一半。雖然彗星的亮度難以預測，但樂觀的估計認為，屆時彗星 Lemmon 可能會變得肉眼可見。這顆彗星在10月中旬之前應該最適合在清晨的天空中觀賞，之後它也將在晚上的天空中可見。這幅圖片展示了彗星快速變化的分裂尾部，照片是在美國德克薩斯州上週拍攝的。
原文:
Comet Lemmon is brightening and moving into morning northern skies. Besides Comet SWAN25B and Comet ATLAS, Comet C/2025 A6 (Lemmon) is now the third comet currently visible with binoculars and on long camera exposures. Comet Lemmon was discovered early this year and is still headed into the inner Solar System. The comet will round the Sun on November 8, but first it will pass its nearest to the Earth — at about half the Earth-Sun distance — on October 21. Although the brightnesses of comets are notoriously hard to predict, optimistic estimates have Comet Lemmon then becoming visible to the unaided eye. The comet should be best seen in predawn skies until mid-October, when it also becomes visible in evening skies. The featured image showing the comet’s split and rapidly changing ion tail was taken in Texas, USA late last week. Growing Gallery: Comet Lemmon in 2025
來源:NASA每日圖片
