月球与地球由阿耳忒弥斯2号机组人员拍摄 Moon and Earth captured by the Artemis II crew (© NASA)

月球与地球由阿耳忒弥斯2号机组人员拍摄 Moon and Earth captured by the Artemis II crew (© NASA)

月瞰寰宇 The lunar perspective

国际月球日

从月球那遍布环形山的表面望去，地球在无垠的黑暗中呈现为一抹微光闪烁的娥眉状——这一罕见的奇观与我们惯常的地面观测视角截然相反。这片由数十亿年撞击作用塑造的荒芜地貌，完整地保存了早期太阳系的演化记录。7月20日是国际月球日，旨在纪念1969年阿波罗11号任务中人类首次踏上月球表面的历史性时刻。该纪念日由联合国于2021年设立，不仅致敬过去的辉煌成就，更聚焦于当下持续不断的月球探测努力。

月球作为地球唯一的天然卫星，在距离地球约23.9万英里的轨道上运行。由于几乎不存在大气层，月球经历着极端的温差跨度——受光面的酷热与阴影区的严寒形成了鲜明对比。然而，月球的影响力远超其表面：它的引力是驱动地球海洋潮汐的核心动力，将这个寂静且真空的世界与人类的日常生活紧密相连。月球不仅是太空探索的目的地，更是夜空中永恒的存在，连接着人类早期的天文观测与当代的深空探测。

International Moon Day

From the moon's cratered surface, Earth appears as a thin, glowing crescent against the darkness—a rare view that reverses our usual perspective. This stark landscape, shaped by billions of years of impacts, preserves a record of the early solar system. July 20 marks International Moon Day, commemorating the 1969 Apollo 11 landing, when humans first set foot on the lunar surface. Established by the United Nations in 2021, the day highlights past achievements and ongoing efforts to explore the moon.

Orbiting about 239,000 miles from Earth, the moon is Earth's only natural satellite. With almost no atmosphere, it experiences extreme temperature contrasts between sunlit heat and shadowed cold. Yet its influence reaches far beyond its surface—its gravity helps drive ocean tides on Earth, linking this quiet, airless world to everyday life. More than a destination for exploration, the moon remains a constant presence in our skies, connecting early observations of the night sky to ongoing exploration today.