卢波夫纳城堡与满月
Lubovna Full Moon
Petr Horalek / Institute of Physics in Opava
Explanation: On July 13 this well-planned telephoto view recorded a Full Moon rising over Lubovna Castle in eastern Slovakia. The photographer was about 3 kilometers from the castle walls and about 357,000 kilometers from this Full Moon near perigee, the closest point in its elliptical orbit. Known to some as supermoons, full moons near perigee are a little brighter and larger in planet Earth’s sky when compared to full moons that occur near the average lunar distance of around 384,000 kilometers. Of course any Full Moon near the horizon can show the effects of refraction over a long sight-line through dense clear atmosphere. In this image, atmospheric refraction creates the slight green flash framed by thin clouds near the top, with a ragged red rim along the bottom edge of July’s perigee Full Moon.
Tomorrow’s picture: Clavius and Tycho
卢波夫纳城堡与满月
Petr Horalek / Institute of Physics in Opava
说明: 这幅精心规划的长焦镜头影像，记录了7月13日从斯洛维尼亚东部的卢波夫纳城堡后方升起的满月。拍摄的当时，摄影者离城墙约3公里远，离位在椭圆轨道近地点附近的满月约357,000公里远。这轮满月或称为超级月亮，因为它与平均距离约385,000公里的满月相比，在地球天空中看起来稍亮些也较大。当然，任何邻近地平线的满月，颀长的视线在穿过浓密透明的大气之时，难免受到折射的影响。大气折射除了在顶部被薄云包围的月盘上方，产生淡淡的绿闪之外，也造就了7月近地点满月底端参差不齐的下缘。
明日的图片: Clavius and Tycho
