“什么？31日可以看到“红”月亮？”
“不对，据说可以看到“蓝”月亮。”
“不不不，是可以看到“红”月亮和“蓝”月亮。”
到底是“红”月亮还是“蓝”月亮？LR都快糊涂了，于是赶紧去查了查。
原来，据天文专家介绍，月全食奇观将于１月３１日震撼登场。只要天气晴朗，我国绝大部分地区都能欣赏到一轮“红月亮”高挂夜空的美妙场景。更激动人心的是，这次是“超级血月”逢“蓝月” 同步现世，罕见天文奇观月底登场！之所以说“蓝”月亮，是因为英文里的blue moon不是表示蓝色的月亮哦，另有它意呢。
A Blue Moon is when two full moons happen in the same calendar month; lunar eclipses occur when the moon passes into Earth's shadow; and supermoons happen when the moon's perigee[1] — its closest approach to Earth in a single orbit — coincides with a full moon. In this case, the supermoon also happens to be the day of the lunar eclipse.
[1]perigee: the point in its orbit around the earth when the moon or an artificial satellite is nearest the earth 近地点
apogee: The apogee of something such as a culture or a business is its highest or its greatest point. 远地点; 鼎盛时期; (某种文化或商业的)最高点
A blue moon refers to the second full moon in a month. Typically, a blue moon happens every two years and eight months.
“蓝月亮”是指一个月内的第二次满月，通常每两年又八个月出现一次。
The first full moon of January occurred on the night of Jan. 1 or the morning of Jan. 2, depending on your location. The second full moon and the lunar eclipse will occur on the night of Jan. 31 or the morning of Feb. 1.And the supermoon will take place on the night of Jan. 30, which is technically one day before the moon reaches peak fullness, but even NASA is willing to call the event a supermoon nonetheless.
第二次满月和月食将于本月31日晚或2月1日早上出现，超级月亮则将于本月30日出现。
然而，并不是所有的地区都可以看到月全食。但是我们就很幸运哦，因为我国绝大部分地区都可以欣赏到这一奇观！
On Jan. 31, not every place on Earth will see the Blue Moon this month, because the second full moon of January won't technically appear in those places until Feb. 1. These places include regions in eastern Asia and eastern Australia, where skywatchers won't see the first full moon until Jan. 2 and the next full moon until the morning of Feb. 1. For example, in Melbourne, Australia, the full moon arrives on Jan. 2 at 1:24 p.m. local time, and the next full moon is on Feb. 1 at 1:26 a.m., so skywatchers will technically miss the Blue Moon by less than 2 hours.
值得一提的是，这次的天文现象可以看作是一种trinity，即“超级满月+蓝月亮+月全食红月亮”。这一天，人眼看到的月亮会比平时大14%，即坊间所称的“超级月亮”。
The event is causing a buzz because it combines three unusual lunar events -- an extra big super moon, a blue moon and a total lunar eclipse.
"It's an astronomical trifecta[2]," said Kelly Beatty, a senior editor at Sky and Telescope magazine.
[2]trifecta:a form of betting in which the punter selects the first three place-winners in a horse race in the correct order (赛马赌博的)三连赢
This full moon is also the third in a series of "supermoons," which happen when the moon is closest to Earth in its orbit. This point, called the perigee, makes the moon appear 14 percent larger and 30 percent brighter.
那么，月底的奇观是如何形成的呢？首先的看看月食的形成过程。
月食，是一种当月球运行进入地球的阴影（阴影又分本影和半影两部分）时，原本可被太阳光照亮的部分，有部分或全部不能被直射阳光照亮，使得位于地球的观测者无法看到普通的月相的天文现象。月食发生时，太阳、地球、月球恰好或几乎在同一条直线上，因此月食必定发生在满月的晚上。【维基百科】
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所以，当月亮运行到近地点时刚好满月，又刚好是月全食，三个周期恰巧交于一点才形成了这种天文奇观。
《每日邮报》报道，这是36年难得一见的天文奇观“超级红月逢蓝月”。
A cosmic event not seen in 36 years -- a rare "super blood blue moon" -- may be glimpsed[3] January 31 in parts of western North America, Asia, the Middle East, Russia and Australia.
[3]glimpse
1) [v] to see someone or something for a moment without getting a complete view of them 一瞥，看一眼
I glimpsed a figure at the window.
我瞥见窗前有个身影。
2) [v] to begin to understand something for a moment 开始理解
For the first time she glimpsed the truth about her sister.
她第一次了解到有关她姐姐的真实情况。
3) [n] a quick look at someone or something that does not allow you to see them clearly 一瞥，瞟一眼 [+ of]
They caught a glimpse of a dark green car.
他们瞥见一辆深绿色的汽车。
brief/fleeting/quick glimpse (= a very short look) 很快的一瞥
We only had a fleeting glimpse of the river.
我们只是匆匆地看了一眼那条河。
4) [v] a short experience of something that helps you begin to understand it 短暂的感受，短暂的体验 [+ of/into/at ]
a glimpse of what life might be like in the future
未来生活可能是什么样子的一次短暂体验
根据《天空和望远镜》杂志的报道，距今最近一次出现的这种现象可以追溯到1982年12月30日，当时欧洲、非洲和西亚地区的人们都可以欣赏到这一奇迹。
According to Sky and Telescope magazine, "the last time a complete lunar cover-up took place on the second full moon of the month was December 30, 1982, at least as reckoned by local time in Europe, Africa, and western Asia -- locations where the event could be seen."
That event also occurred at the moon's orbital perigee, making it an extra bright supermoon.
大家一定要抓住这次机会啊，因为下一次超级月亮月食要等到2019年1月21日啦，而且那次也没有“蓝月亮”哦。
The next supermoon lunar eclipse visible throughout all of the United States will be January 21, 2019 -- though that one will not be a blue moon.
来源：每日邮报
http://t.cn/R8yIe7N
