The planet Mercury is seen in silhouette (lower left) as it transits across the face of the Sun in this photo taken in Boyertown, Pennsylvania, United States on Monday. Mercury passes between Earth and the Sun only about 13 times a century, with the previous transit taking place in 2006.

By
Daily Excelsior
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The planet Mercury is seen in silhouette (lower left) as it transits across the face of the Sun in this photo taken in Boyertown, Pennsylvania, United States on Monday. Mercury passes between Earth and the Sun only about 13 times a century, with the previous transit taking place in 2006.
The planet Mercury is seen in silhouette (lower left) as it transits across the face of the Sun in this photo taken in Boyertown, Pennsylvania, United States on Monday. Mercury passes between Earth and the Sun only about 13 times a century, with the previous transit taking place in 2006.

The planet Mercury is seen in silhouette (lower left) as it transits across the face of the Sun in this photo taken in Boyertown, Pennsylvania, United States on Monday.  Mercury passes between Earth and the Sun only about 13 times a century, with the previous transit taking place in 2006.

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