2020年7月19日

Rotating Moon from LRO
Video Credit:
NASA, LRO, Arizona State U.

Explanation: No one, presently, sees the Moon rotate like this. That’s because the Earth’s moon is tidally locked to the Earth, showing us only one side. Given modern digital technology, however, combined with many detailed images returned by the Lunar Reconnaissance Orbiter (LRO), a high resolution virtual Moon rotation movie has been composed. The featured time-lapse video starts with the standard Earth view of the Moon. Quickly, though, Mare Orientale, a large crater with a dark center that is difficult to see from the Earth, rotates into view just below the equator. From an entire lunar month condensed into 24 seconds, the video clearly shows that the Earth side of the Moon contains an abundance of dark lunar maria, while the lunar far side is dominated by bright lunar highlands. Currently, over 19 new missions to the Moon are under active development from eight different countries, most of which have expected launch dates in the next three years.

Notable Images of Comet NEOWISE Submitted to APOD:|| July 18 || July 17 || July 16 || July 15 || July 14 || July 13 || July 12 || July 11 || July 10 & earlier ||

Tomorrow’s picture: comet tale


月球探勘号见到的自转月亮
影片提供:
NASA, LRO, Arizona State U.

说明: 在目前,没人能目睹月亮这样自转。这是因为月亮是受到地球的潮汐锁定,只能以相同的一面对着我们。不过以现在的数位技术,再加上月球探勘号(LRO)回传的许多细致的影像,得以建构出虚拟的高解析月球自转电影。上面这部缩时影片的开头,是标准的地球观月视角。不过很快的,东海这个拥有黝黑中心区、在地球很难见到的撞击坑,就从赤道下方旋入视野里。这部把整个月亮周期浓缩成24秒的影片,清楚呈现面向地球这面的月球,散布着许多黝黑的月海,而月球反面则主要是明亮的月面高原。在目前,有8个国家正在发展超过19个新的探月任务,而且大部分任务预定的发射日期,散布在接下来的3年之中。

提交给APOD的NEOWISE彗星的著名图像:|| 7月18日 || 7月17日 || 7月16日 || 7月15日 || 7月14日 || 7月13日 || 7月12日 || 7月11日 || 7月10日或更早 ||

明日的图片: comet tale

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