2025年5月31日
Afterimage Sunset
Image Credit & Copyright: Marcella Giulia Pace
Explanation: On May 7, the Sun setting behind a church bell tower was captured in this filtered and manipulated digital skyscape from Ragusa, Sicily, planet Earth. In this version of the image the colors look bizarre. Still, an intriguing optical illusion known as an afterimage can help you experience the same scene with a more natural looking appearance. To try it, find the sunspots of active region AR4079 grouped near the bottom of the blue solar disk. Relax and stare at the dark sunspot group for about 30 seconds, then close your eyes or shift your gaze to a plain white surface. In a moment an afterimage of the sunset should faintly appear. But the afterimage sunset will have this image’s complementary colors and a more normal yellow Sun against a familiar blue sky.
Tomorrow’s picture: wildly interacting
日落景观的余像
影像提供与版权: Marcella Giulia Pace
说明: 这幅经过滤镜及数位处理的天空影像，是在今年的5月7日摄于地球西西里岛的拉古萨市，主题则是落向教堂钟楼后方的夕阳。在这个特殊版本的影像里，夕阳的色彩看起来格外怪异。不过，名为“余像（afterimage 残像）”的有趣视幻觉，可用来还原这幅影像的部分原本样貌。请进行如下的操作：首先找到蓝色日盘底缘附近的活跃区AR 4079内的太阳黑子。接着，放松并凝视这群暗色的黑子群约30秒，然后闭上眼睛或把视线移到纯白色的区域。很快的，这片日落景观的余像就会浮现。有别于原图，余像会拥有原图的互补色，尤其是正常泛黄的夕阳有蓝天为衬托。
明日的图片: wildly interacting
