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今晚，蓝月亮将再次出现，为谢幕的"天宫一号"送行
source link: http://tech.sina.com.cn/d/2018-03-31/doc-ifysucyf7975364.shtml
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来源：科普中国微信公众号本周末，天文和航天方面有两个比较受人关注的事情发生，一是出现今年内的第二次蓝月亮，二是“天宫一号”即将要坠入地球大气层，下面就分别说一下这两个事件。不是蓝色的“蓝月亮”又来了本周六（3月31日），夜空将出现今年的第二
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