圆形日晕
(原标题: Circular Sun Halo)
2021-06-10
浏览次数: 35
想看太阳周围的光环吗？这在世界各地的白天都很容易做到。由稀薄的高卷云中随机定向的冰晶形成的圆形22度光晕比彩虹更常见。这张照片是5月29日在意大利罗马附近用智能手机拍摄的。小心地挡住太阳，例如用指尖，通常就能显示出常见的明亮光环环。光晕的特征角半径大约等于你伸出的手臂末端的大拇指到小指的长度。想看火环月食吗？这是更加困难。今天（6月10日）的日食壮观的环状阶段，被称为火环，只有当站在月球狭窄的阴影轨道上，经过加拿大北部、格陵兰岛、北极和俄罗斯东部的部分地区时，才能短暂地看到。然而，当从更广泛的地区（包括亚洲北部、欧洲和美国部分地区）看到日食时，日食是局部的。
查看原文解释
Want to see a ring around the Sun? It's easy to do in daytime skies around the world. Created by randomly oriented ice crystals in thin high cirrus clouds, circular 22 degree halos are visible much more often than rainbows. This one was captured by smart phone photography on May 29 near Rome, Italy. Carefully blocking the Sun, for example with a finger tip, is usually all that it takes to reveal the common bright halo ring. The halo's characteristic angular radius is about equal to the span of your hand, thumb to little finger, at the end of your outstretched arm. Want to see a ring of fire eclipse? That's harder. The spectacular annular phase of today's (June 10) solar eclipse, known as a ring of fire, was briefly visible only when standing along the Moon's narrow shadow track that passes over parts of northern Canada, Greenland, the Arctic, and eastern Russia. The solar eclipse was partial though, when seen from broader regions, including northern Asia, Europe, and parts of the US.
© Vincenzo Mirabella