土星恩克拉多斯上的新鮮虎斑紋
Fresh Tiger Stripes on Saturn's Enceladus
發表日期:2024-08-25
土星衛星恩克拉多斯(Enceladus)上的峽谷是否有地下海洋噴出? 眾所周知,被稱為 "虎紋 "的長條形地貌將冰從衛星冰冷的內部噴向太空,在衛星南極上空形成了細微冰粒雲,並創造了土星神秘的E 環。 這方面的證據來自 2004 年至 2017 年期間圍繞土星執行的機器人卡西尼號太空船。 圖為近距離飛掠時拍攝的土衛二高畫質影像。 被稱為 "虎紋 "的不尋常表面特徵在假色藍色中清晰可見。 為什麼 "土衛二 "如此活躍仍然是個謎,因為與它大小相近的鄰近衛星 "米馬斯 "看起來死氣沉沉。對噴射出的冰粒進行分析後發現,恩克拉多斯內部存在複雜的有機分子。這些富含碳的大分子支援--但不能證明--土衛二表面下的海洋可能蘊藏著生命。 探索你的宇宙隨機 APOD 生成器
原文:Do underground oceans vent through canyons on Saturn's moon Enceladus? Long features dubbed tiger stripes are known to be spewing ice from the moon's icy interior into space, creating a cloud of fine ice particles over the moon's South Pole and creating Saturn's mysterious E-ring. Evidence for this has come from the robot Cassini spacecraft that orbited Saturn from 2004 to 2017. Pictured here, a high resolution image of Enceladus is shown from a close flyby. The unusual surface features dubbed tiger stripes are visible in false-color blue. Why Enceladus is active remains a mystery, as the neighboring moon Mimas, approximately the same size, appears quite dead. An analysis of ejected ice grains has yielded evidence that complex organic molecules exist inside Enceladus. These large carbon-rich molecules bolster -- but do not prove -- that oceans under Enceladus' surface could contain life. Explore Your Universe: Random APOD Generator
※ 本文由萌芽機器人自動轉貼自每日一天文圖(Astronomy Picture of the Day,APOD),原文為英文,正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理,內容僅供參考,若有任何錯誤之處還請見諒!
關於每日一天文圖:每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務,網站每天提供一張影像或圖片,並由天文學家撰寫扼要說明其特別之處。