新月與姐妹星
Young Moon and Sister Stars
來源：Giorgia Hofer｜發表日期：2026-04-24
在這幅從地球上拍攝的壯麗天象中，新月被陽光照亮的一側彷彿正擁抱著那暗淡的月背。 這張透過長焦鏡頭追蹤天空拍攝的單張照片攝於 4 月 19 日夜，當時月齡兩天的月亮正處於其橢圓軌道上的近地點附近。在那天，這輪新月在天空中也緊鄰著美麗的昴星團。由於月光被雲層遮蔽，昴星團的姐妹星群聚集在明亮的新月下方，透過微弱但色彩斑斕的月暈清晰可見。 月球背向地球的一面被地光照亮，這是太陽光從地球表面反射而來的光芒。這種灰色的微光，也被稱為“新月懷抱中的老月”，在北半球的春季往往更為明亮。目前，月球軌道使其每月都會在地球夜空中接近昴星團，不過當月相接近新月時，這種緊密的合相最為容易觀測。
原文：Sunlit arms of a crescent moon seem to embrace the faint lunar night side in this dramatic celestial scene from planet Earth. The single telephoto exposure tracking the sky was captured on the night of April 19, when a two day old Moon was near perigee in its elliptical orbit. On that date, the young Moon was also close on the sky to the lovely Pleiades Star Cluster. With the moonlight dimmed by clouds the Pleiades sister stars gather below the Moon's bright crescent, seen through a faint but colorful lunar corona. The lunar night side is illuminated by earthshine, sunlight reflected from the Earth itself. The Moon's ashen glow, also known as the "old moon in the young moon's arms", tends to be brighter in the northern hemisphere spring. And for now, the Moon's orbit takes it near the Pleiades stars each month in planet Earth's sky, though their close conjunctions are easiest to see when the Moon is near a crescent phase.
※ 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！
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