The planet Mercury transits across the face of the sun Monday, May 9, 2016, as viewed from Boyertown, Pennsylvania, is seen in silhouette at lower third of image.
Mercury passes between Earth and the sun only about 13 times a century, with the previous transit taking place in 2006.
Image Credit: (NASA/Bill Ingalls)
— NASASunEarth (@NASASunEarth) May 10, 2016
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