雪城之外的蓝色超级月亮
(原标题: Blue Supermoon Beyond Syracuse)
2023-09-05
浏览次数: 77
上一次满月格外不寻常。首先，那是一个蓝月亮。蓝月亮的现代定义是在一个日历月内出现的第二次满月。由于2023年有13次满月，一个月必须有两次满月——那个月就是8月。第一次满月发生在8月1日，被命名为鲟鱼月。上次满月不寻常的第二个原因是因为它是一个超级月亮。现代对超级月亮的定义是，当月亮相对接近地球时，它达到了满月的阶段，因此看起来比平均水平更大、更亮。图为2023年的蓝色超级月亮，在意大利西西里岛锡拉丘兹一座历史悠久的城堡和灯塔后面盘旋。图片：2023年8月提交给APOD的超级月亮图片
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The last full moon was doubly unusual. First of all, it was a blue moon. A modern definition of a blue moon is a second full moon to occur during one calendar month. Since there are 13 full moons in 2023, one month has to have two -- and that month was August. The first full moon was on August 1 and named a Sturgeon Moon. The second reason that the last full moon was unusual was because it was a supermoon. A modern definition of supermoon is a moon that reaches its full phase when it is relatively close to Earth -- and so appears a bit larger and brighter than average. Pictured, the blue supermoon of 2023 was imaged hovering far behind a historic castle and lighthouse in Syracuse, Sicily, Italy. Gallery: Selected August 2023 supermoon images submitted to APOD
© Kevin Saragozza