On July 26, 2014, from 10:57 a.m. to 11:42 a.m. EDT, the moon crosses between NASA’s Solar Dynamics Observatory (SDO) and the sun, a phenomenon called a lunar transit. A lunar transit happens approximately twice a year, causing a partial solar eclipse that can only be seen from SDO. Images of the eclipse show a crisp lunar horizon, because the moon has no atmosphere that would distort light.
July 29, 2014
http://www.voanews.com/media/photogallery/july-29-2014-day-in-photos/1967482.html
Transit (astronomy) - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Transit_(astronomy)
凌 (天體) - 維基百科,自由的百科全書
http://zh.wikipedia.org/wiki/%E5%87%8C_(%E5%A4%A9%E9%AB%94)
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