添加闰秒是为了将UTC保持在观察到的天文时间的0.9秒范围内。
A leap second is added in order to keep UTC within 0.9 seconds of observed astronomical time.
摄影师阿伦·弗里德曼在家中后院将自己的相机与一个小型天文望远镜相连，并加了滤镜。他对太阳拍了一个90秒的视频，从中挑选出了异常清晰的太阳表面的图像。
Alan Friedman attached his camera to a telescope in his backyard and used light filters to make a 90-second video that includes crystal clear images of the sun's atmosphere.
天文学家、历史学家及其它许多学者，皆对于往后即将废除润秒感到苦恼，并且对于时间配合地球自转的议题，展开热烈的讨论。
Astronomers, historians and others are upset about the prospect of losing the leap second and have initiated a spirited debate to keep time tied to the earth's rotation.
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