最后的满月

2023年12月30日

The Last Full Moon
Image Credit & Copyright: Giacomo Venturin

Explanation: Known to some in the northern hemisphere as December’s Cold Moon or the Long Night Moon, the last full moon of 2023 is rising in this surreal mountain and skyscape. The Daliesque scene was captured in a single exposure with a camera and long telephoto lens near Monte Grappa, Italy. The full moon is not melting, though. Its stretched and distorted appearance near the horizon is caused as refraction along the line of sight changes and creates shifting images or mirages of the bright lunar disk. The changes in atmospheric refraction correspond to atmospheric layers with sharply different temperatures and densities. Other effects of atmospheric refraction produced by the long sight-line to this full moon rising include the thin red rim seen faintly on the distorted lower edge of the Moon and a thin green rim along the top.

Tomorrow’s picture: Illustris

最后的满月
影像提供与版权: Giacomo Venturin

说明: 对北半球的某些人来说，它有十二月的冷月或长夜月之称，而这轮2023年的最后满月，在这片超现实的山峦及天空景观里冉冉升起。这幅有如达里画作的场景，是以搭配长焦镜头的相机，在意大利格拉帕山附近所拍摄的单曝光影像。不过，影像里的满月并未融化。它在地平线附近的拉伸和扭曲外观，源自沿着视线方向的大气折射效应，所造成的明亮月盘移位，或可称之为月盘蜃影。造成这些大气折射对应的大气分层，则各自拥有截然不同的温度和密度。此外，沿着这个颀长的视线方向，此次满月东升所造就的其他大气折射效应，还包括在扭曲月盘下边缘隐约可见的纤薄红边，以及月盘顶端的绿缘。

明日的图片: Illustris