活久见！本周五将会出现罕见“黑月亮”.

　　When it comes to rare lunar events, September 2016 seems to be the month that keeps on giving: This Friday, September 30, a Black Moon will rise in the skies of the Western Hemisphere, a phenomenon we haven’t seen since March 2014.

　　2016年9月似乎源源不断地出现奇异的月亮现象：本周五，也就是9月30日，西半球的天空将出现一轮“黑月亮”，这种现象自2014年3月之后还是第一次出现。

　　So what is a Black Moon exactly? It has several dinitions, but in Friday’s case, a Black Moon is the second new moon to occur in a single month, something that only happens roughly every 32 months, according to Space.com. (Typically, each month, we get a full moon and new moon-generally, a Blue Moon rers to when we get a second full moon in one calendar month.)

　　那么，究竟什么是“黑月亮”呢?根据Space.com网站的信息，它有很多个定义，但是在周五的情况中，“黑月亮”是一个月之中第二次出现新月，这种现象约32个月出现一次。(每个月，我们通常会看到一次满月和一次新月;“黑月亮”指的就是在一个月之内看到两次新月的现象。)

　　The moon itself will be pretty much invisible, since a Black Moon rers to the moment when the dark side of the moon faces the Earth, but it will provide a great opportunity for stargazing, thanks to all that darkness.

　　月球本身几乎是看不见的，因为“黑月亮”一般是月球的黑暗一面朝向地球;但是因为这样，给观察星空提供了好机会。

　　The Black Moon, which will occur at 8:11 p.m. ET on Friday, will only be happening in the Western Hemisphere because, technically, the new moon will happen on October 1 for the Eastern Hemisphere (they’ll be getting their Black Moon at the end of next month).

　　“黑月亮”会发生在周五美国东部时间晚8点11分，只会发生在西半球，因为东半球的新月会发生在10月1日。(他们会在下个月月末看到“黑月亮”)

　　The next time we’ll see a second new moon in a single calendar month in the Americas will be July 2019.

　　下一次在美洲地区看到“黑月亮”将会是2019年7月。