火星月食火星月
Martian Moon Eclipses Martian Moon

發表日期:2024-02-26
如果天空中有兩顆衛星--它們相互黯然失色會怎樣?這種情況就發生在火星上。這段影片從太空中展示了這一不同尋常的日食。圖為火星上的兩顆衛星:較大的火衛一(Phobos)和較小的火衛二(Deimos),前者的軌道離火星較近,後者的軌道離火星較遠。這組照片是去年由歐空局的 "火星快車 "號拍攝的。從火星表面也能看到類似的日食,不過非常罕見。 不過,從火星表面看,距離較近的衛星火衛一似乎會從距離較遠的衛星狄莫斯的前面經過。最奇怪的是,這兩顆衛星繞火星執行的距離都很近,從地球上看,與地球上的月球相比,它們似乎都在向後移動,都從西邊升起,從東邊落下。火衛一是距離較近的衛星,它的軌道離火星非常近,執行速度也非常快,每天大約有三次幾乎從火星上空經過。
原文:What if there were two moons in the sky -- and they eclipsed each other? This happens on Mars. The featured video shows a version of this unusual eclipse from space. Pictured are the two moons of Mars: the larger Phobos, which orbits closer to the red planet, and the smaller Deimos, which orbits further out. The sequence was captured last year by the ESA’s Mars Express, a robotic spacecraft that itself orbits Mars. A similar eclipse is visible from the Martian surface, although very rarely. From the surface, though, the closer moon Phobos would appear to pass in front of farther moon Deimos. Most oddly, both moons orbit Mars so close that they appear to move backwards when compared to Earth's Moon from Earth, both rising in west and setting in the east. Phobos, the closer moon, orbits so close and so fast that it passes nearly overhead about three times a day.
※ 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。