日环食期间被放大的月球山峰

2020 June 22

Moon Mountains Magnified during Ring of Fire Eclipse
Image Credit & Copyright: Wang Letian (Eyes at Night)

Explanation: What are those dark streaks in this composite image of yesterday’s solar eclipse? They are reversed shadows of mountains at the edge of the Moon. The center image, captured from Xiamen, China, has the Moon’s center directly in front of the Sun’s center. The Moon, though, was too far from the Earth to completely block the entire Sun. Light that streamed around all of the edges of the Moon is called a ring of fire. Images at each end of the sequence show sunlight that streamed through lunar valleys. As the Moon moved further in front of the Sun, left to right, only the higher peaks on the Moon’s perimeter could block sunlight. Therefore, the dark streaks are projected, distorted, reversed, and magnified shadows of mountains at the Moon’s edge. Bright areas are called Bailey’s Beads. Only a narrow swath across Earth’s Eastern Hemisphere was able to see yesterday’s full annular solar eclipse. Next June, though, a narrow swath across Earth’s Northern Hemisphere will be able to see the next annular solar eclipse. A total solar eclipse will be visible at the bottom of the world near the end of this year.

Gallery: Notable images of the Annular Solar Eclipse of 2020 June submitted to APOD

Tomorrow’s picture: x-raying the sky

日环食期间被放大的月球山峰
影像提供与版权：Wang Letian（王乐天）（ Eyes atNight)

说明：在这张摄于昨天日食期间的组合影像里，这些暗纹是什么？它们是月缘山峰的倒转的影子。最中间摄于中国厦门的影像，呈现月亮中心与太阳中心重合的食甚阶段。 在此次日食中，月亮离地球太远，而无法遮住整个日盘。因此，阳光从月亮的所有边缘通过来，形成火之环的景观。而在这个系列影像里，环食开始的食既和结束的生光阶段，阳光会从月谷漏出来。而随着月亮从左到右移过日盘，只有较高的月缘山峰，才能挡住阳光。因此这些暗纹，其实是月缘山峰投射的扭曲、倒转及放大影子。图像中的亮区则称为倍里珠。在昨天，只有在东半球的狭窄食带内，才能见到完整的日环食过程。在今年六月，北半球一道狭窄的食带内可见到另一次日环食事件。在年底时，南极洲可见到日全食。

画廊：提交给APOD的2020年6月日环食的著名图像

明日的图片：x-raying the sky