Coming May 9: A rare look at Mercury crossing the face of the sun

On Monday, May 9, 2016, Mercury will move across the face of the sun, offering a rare viewing opportunity for professional astronomers and backyard sky watchers alike. The next time this event happens will be Nov. 11, 2019.
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On Monday, May 9, 2016, Mercury will move across the face of the sun, offering a rare viewing opportunity for professional astronomers and backyard sky watchers alike. The next time this event happens will be Nov. 11, 2019.