月球遠端
Lunar Farside

發表日期:2025-06-28
同步旋轉的月球總是向地球居民展示其熟悉的近面。不過,從月球軌道上看,月球的遠方也會變得熟悉起來。事實上,這張清晰的照片是月球勘測軌道器廣角相機拍攝的馬賽克照片,以月球遠側為中心。它是 2009 年 11 月至 2011 年 2 月期間獲取的 15000 多張全球馬賽克影像的一部分,最高解析度版本顯示了每畫素 100 米的地貌特徵。令人驚訝的是,遠月面粗糙且飽受摧殘的表面與近月面覆蓋著光滑的深色月球泥沙的表面看起來大相徑庭。 一種可能的解釋是遠側地殼較厚,使得內部的熔融物質難以流向地表,形成深色光滑的泥沙。
原文:Tidally locked in synchronous rotation, the Moon always presents its familiar nearside to denizens of planet Earth. From lunar orbit, the Moon's farside can become familiar, though. In fact this sharp picture, a mosaic from the Lunar Reconnaissance Orbiter's wide angle camera, is centered on the lunar farside. Part of a global mosaic of over 15,000 images acquired between November 2009 and February 2011, the highest resolution version shows features at a scale of 100 meters per pixel. Surprisingly, the rough and battered surface of the farside looks very different from the nearside covered with smooth dark lunar maria. A likely explanation is that the farside crust is thicker, making it harder for molten material from the interior to flow to the surface and form dark, smooth maria.
※ 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。