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The planet Mercury is seen in silhouette from Boyertown, Pennsylvania, as it transits across the face of the sun May 9, 2016.
The planet Mercury is seen in silhouette from Boyertown, Pennsylvania, as it transits across the face of the sun May 9, 2016. Tribune News Service
The planet Mercury is seen in silhouette from Boyertown, Pennsylvania, as it transits across the face of the sun May 9, 2016.