星際地球
Interplanetary Earth
發表日期:2024-11-23
2013 年 7 月 19 日,太陽系的另外兩個世界--最內層的行星水星和環狀氣體巨行星土星--在同一天拍攝到了地球的照片,這在星際間尚屬首次。左圖中,地球是土星環下方的淡藍色小點,由當時環繞最外層氣體巨行星執行的卡西尼號機器人太空船拍攝。同一天,地球上的人們也拍攝了許多自己的土星照片。右圖是當時在水星軌道上的向陽 MESSENGER 太空飛行器拍攝到的地月系統在黑暗的太空背景下的景象。MESSENGER 所拍攝的影像是尋找水星小型天然衛星的一部分,這些衛星應該非常暗淡。在 MESSENGER 的影像中,較亮的地球和月球都曝光過度,在反射的陽光下閃閃發光。卡西尼號和 MESSENGER 號都註定不會返回自己的母星,因此它們已經退出了太陽系探索任務。
原文:In an interplanetary first, on July 19, 2013 Earth was photographed on the same day from two other worlds of the Solar System, innermost planet Mercury and ringed gas giant Saturn. Pictured on the left, Earth is the pale blue dot just below the rings of Saturn, as captured by the robotic Cassini spacecraft then orbiting the outermost gas giant. On that same day people across planet Earth snapped many of their own pictures of Saturn. On the right, the Earth-Moon system is seen against the dark background of space as captured by the sunward MESSENGER spacecraft, then in Mercury orbit. MESSENGER took its image as part of a search for small natural satellites of Mercury, moons that would be expected to be quite dim. In the MESSENGER image, the brighter Earth and Moon are both overexposed and shine brightly with reflected sunlight. Destined not to return to their home world, both Cassini and MESSENGER have since retired from their missions of Solar System exploration.
※ 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。