Today the solstice occurs at 23:38 Universal Time, the Sun reaching its southernmost declination in planet Earth's sky. Of course, the December solstice marks the beginning of winter in the northern hemisphere and summer in the south. When viewed from northern latitudes, and as shown in the above horizontally compressed image, the Sun will make its lowest arc through the sky along the southern horizon. So in the north, the solstice day has the shortest length of time between sunrise and sunset and fewest hours of daylight. This striking composite image follows the Sun's path through the December solstice day of 2005 in a beautiful blue sky, looking down the Tyrrhenian Sea coast from Santa Severa toward Fiumicino, Italy. The view covers about 115 degrees in 43 separate, well-planned exposures from sunrise to sunset.  今年的至点是世界时的23：38（即22日北京时间7：38左右——译者注），太阳到达地球的南回归线。当然，这意味着北半球冬季和南半球夏季的开始。在北半球，如上图所示，太阳沿着地平线南部以最低弧度划过天际。所以在北半球，冬至日的白天是最短的，只有几个小时而已。这张合成的照片显示了2005年冬至日太阳在碧空中一整天的轨迹，是在意大利费米齐诺Santa Severa的伊特鲁利亚海岸线拍摄的。这张照片是43张不同时间的照片合理曝光之后合成的，展示了从日出到日落太阳115度的轨迹。
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