2018年1月31日超级蓝血月+月全食怎么形成的？如何拍最美照片

　　北京时间1月31日晚，天文爱好者等待已久的“超级蓝月”+“月全食”将在天幕现身。该准备哪些长枪短炮？用手机如何拍出最美照片？观月还需储备哪些知识点？收下这份观月攻略，让你有备而去，尽兴而归。

　　An illustration of a super blue blood moon from NASA.

此次“超级蓝月”与月全食组合为何如此受瞩目？

　　其实，“蓝月”并不稀有，但如果“蓝月”是一颗“超级月亮”，又同时发生月全食，那就是十分罕见的天象。

　　On January 31, you will be treated to both a visible supermoon—what we call a full moon at its closest orbital point to Earth—and a total lunar eclipse. As the second full moon of the month, it earns the title of a blue moon as well. The celestial coincidence hasn’t happened in more than 150 years. That means there were people who lived and died on this Earth without ever having had a chance to see this phenomenon, which won’t reappear again for another decade.

　　1月31日，你会同时看到肉眼可见的超级月亮和月全食。超级月亮指的是在绕地运行轨道上处于近地点的满月。作为1月第二次满月，这次超级月亮也被称为超级蓝月。这种天文上的巧合是150多年来首次出现，也就是说有人一辈子都没有见过，而未来十年都不会重现。

　　This supermoon also happens to be the final one in a supermoon trilogy—the first two of which appeared on Dec. 3 and Jan. 1.

　　这次超级月亮还是一连三次超级月亮的最后一次——前两次发生在2017年12月3日和2018年1月1日。