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小衛星戴奧摩斯
Small Moon Deimos
發表日期:2024-09-07
火星上有兩顆小衛星--火衛一和火衛二,分別以希臘神話中的 "恐懼 "和 "恐慌 "命名。這兩幅圖都顯示了較小的衛星狄莫斯的詳細表面檢視。這些影像是 2009 年由火星勘測軌道飛行器上的 HiRISE 相機拍攝的,火星勘測軌道飛行器是美國宇航局的長壽命星際網際網路衛星。狄莫斯是兩顆火星衛星中最外圍的一顆,也是太陽系中已知最小的衛星之一,直徑僅約 15 公里。 這兩顆火衛一都是由在華盛頓特區美國海軍天文臺工作的美國天文學家阿薩夫-霍爾於 1877 年發現的,但它們的存在是由提出行星運動定律的天文學家約翰內斯-開普勒於 1610 年左右推測出來的。在這種情況下,開普勒的預測並非基於科學原理,但他的著作和思想卻影響深遠,以至於在小說作品中,如喬納森-斯威夫特的《格列佛遊記》(寫於 1726 年,比發現它們的時間早了 150 多年),都有關於這兩顆火星衛星的論述。
原文:Mars has two tiny moons, Phobos and Deimos, named for the figures in Greek mythology Fear and Panic. Detailed surface views of smaller moon Deimos are shown in both these panels. The images were taken in 2009, by the HiRISE camera on board the Mars Reconnaissance Orbiter spacecraft, NASA's long-lived interplanetary internet satellite. The outermost of the two Martian moons, Deimos is one of the smallest known moons in the Solar System, measuring only about 15 kilometers across. Both Martian moons were discovered in 1877 by Asaph Hall, an American astronomer working at the US Naval Observatory in Washington D.C. But their existence was postulated around 1610 by Johannes Kepler, the astronomer who derived the laws of planetary motion. In this case, Kepler's prediction was not based on scientific principles, but his writings and ideas were so influential that the two Martian moons are discussed in works of fiction such as Jonathan Swift's Gulliver's Travels, written in 1726, over 150 years before their discovery.
※ 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。