日晕环

2023年10月14日

Circular Sun Halo
Image Credit & Copyright: Vincenzo Mirabella

Explanation: 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, 2021 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 (October 14) solar eclipse, known as a ring of fire, is briefly visible only when standing along the Moon’s narrow shadow track that passes over limited parts of North, Central, and South America. The solar eclipse is partial though, when seen from broader regions throughout the Americas.

Album growing: Selected eclipse images sent in to APOD

Tomorrow’s picture: eclipse treed

日晕环
影像提供与版权: Vincenzo Mirabella

说明: 想看环拱太阳的晕环吗？在世界各地的白昼天空中，它是轻易可见的景观。张角22度、远比彩虹还常见的日晕环，是由薄薄高卷云内随机排列的冰晶所造成的。上面这幅来自手机相机的日晕影像，则是在2021年5月29日摄于义大利的罗马附近。要让明亮的晕环显现，其实只要仔细遮住日盘即可，例如这幅影像里的指尖。晕环的特征半径，大约与手伸长时，拇指到小指头的手掌张角相当。想看火之环日食吗？这稍难一些。在今天（10月14日）的日食里，名为火之环的精采环食阶段，只有位在通过北美洲、中美洲、及南美洲的狭窄月影带内的住民才得见。不过在更辽阔的美洲区域，可见到日偏食。

增加相册: 将选定的日食图像发送到APOD

明日的图片: eclipse treed