NASA·APOD每日天文一图2022.5.30 [超高清]

月食发出的红色曙光！！！

What's happening behind that island? Things both expected and unexpected. Expected, perhaps, the pictured rays of light -- called crepuscular rays -- originate from the Sun. Unexpected, though, the Sun was being partially eclipsed by the Moon at the time -- late last month. Expected, perhaps, the Sun's rays are quite bright as they shine through gaps in below-horizon clouds. Unexpected, though, the crepuscular rays are quite red, likely the result an abundance of aerosols in Earth's atmosphere scattering away much of the blue light. Expected, with hope, a memorable scene featuring both the Moon and the Sun, superposed. Unfortunately, from this location -- in Uruguay looking toward Argentina -- clouds obscured the eclipse -- which wasn't completely unexpected. However, after packing up to go home, the beauty of bright red crepuscular rays emerged -- quite unexpectedly. Oh -- and that island on the horizon -- it's really two islands. 

那个岛后面发生了什么事？预料之外的事情。猜测，可能照片中的光线——称为黄昏光线——来自太阳。然而，出乎意料的是，上个月底，当时太阳正被月亮部分遮住。也许可以预料，当阳光穿过地平线以下云层的缝隙时，会非常明亮。然而，出乎意料的是，曙光是相当红色的，这很可能是地球大气层中大量气溶胶散射掉大部分蓝光的结果。怀着希望，我们期待着一个难忘的场景，月亮和太阳重叠在一起。不幸的是，在乌拉圭，从这个位置看向阿根廷，云遮住了日食，这并不完全出乎意料。然而，收拾好行装回家后，鲜红的曙光之美出现了——出乎意料。哦--地平线上的那个岛--实际上是两个岛。