• Shepherd Heinz Greiner watches the beginning of a total solar eclipse near Augsburg, southern Germany, on Wednesday, Aug. 11, 1999. (AP Photo/Frank Boxler, File)
  • FILE - Stone statues known as Moais stand together during a total solar eclipse in Easter Island, Chile, some 4,000 kilometers (2,480 miles) west of the Chilean coast, Sunday, July 11, 2010. (AP Photo/Patricio Munoz, File)
  • A man uses special glasses to view a partial solar eclipse as people gather near the Sphinx at the Giza Pyramids on the outskirts of Cairo, Egypt, Friday, March 20, 2015. The partial eclipse was visible across Europe and parts of Asia and Africa, while sky-gazers in the Arctic were treated to a perfect view of a total solar eclipse as the moon completely blocked out the sun in a clear sky. (AP Photo/Khaled Kamel, File)
  • This multiple exposure photograph shows the progression of a partial solar eclipse over the Gateway Arch in St. Louis on Aug. 21, 2017. (AP Photo/Jeff Roberson, File)
  • FILE - Lucy Maphiri, left, and Margaret Makuya watch the total solar eclipse over Shingwedzi camp in the Kruger National Park, South Africa, Wednesday, Dec. 4, 2002. (AP Photo/Jon Hrusa, File)