August 21, 2017

The moon covers the sun during a total eclipse Monday, Aug. 21, 2017, near Redmond, Ore. (AP Photo/Ted S. Warren)

In this multiple exposure photograph, the phases of a partial solar eclipse are seen over the Gateway Arch on Monday, Aug. 21, 2017, in St. Louis. The Gateway Arch was just a few miles outside of the path of totality. (AP Photo/Jeff Roberson)

This composite image, made from 4 frames, shows the International Space Station, with a crew of six onboard, as it transits the Sun at roughly five miles per second during a partial solar eclipse, Aug. 21, 2017 from , Northern Cascades National Park in Wa

Projected images of the eclipse is seen through the leaves on the trees on the sidewalk at the White House in Washington, Monday, Aug. 21, 2017. (AP Photo/Alex Brandon)

President Donald Trump, first lady Melania Trump and their son Barron watch the solar eclipse, Monday, Aug. 21, 2017, at the White House in Washington. (AP Andrew Harnik)

A crowd wears protective glasses as they watch the beginning of the solar eclipse from Salem, Ore., Monday, Aug. 21, 2017.

Kayley Terrez is lifted up to see the solar eclipse through a telescope as a large crowd gathers at the Griffith Observatory to watch the solar eclipse in Los Angeles Monday, Aug. 21, 2017. (AP Photo/Richard Vogel)

A crowd gathers in front of the Hollywood sign at the Griffith Observatory to watch the solar eclipse in Los Angeles on Monday, Aug. 21, 2017. (AP Photo/Richard Vogel)

David Burt, with team LS3P and architectural firm out of Charleston, S.C., makes the official eclipse sand castle logo in preparation for the solar eclipse Monday, Aug. 21, 2017, on the beach at Isle of Palms, S.C. The city of Isle of Palms hosted a beach party "Get Eclipsed on IOP". (AP Photo/Mic Smith)

Griffin O'Roak watches the rising sun with his homemade eclipse viewer at a gathering of eclipse viewers in Salem, Ore., Monday, Aug. 21, 2017. (AP Photo/Don Ryan)

People watch the start of the solar eclipse and raise their hands in prayer in an eclipse viewing event led by Native American elders, at Big Summit Prairie ranch in Oregon's Ochoco National Forest near the city of Mitchell on August 21, 2017.

Michelle Campano (Right) and her sisters Jennifer (Middle) and Lauren Campano, all of Rockville, Maryland, check on the position of the sun using homemade solar viewers from the flight deck of the Naval museum ship U.S.S. Yorktown during the Great America

People watch the solar eclipse from the observation deck of The Empire State Building in New York City, August 21, 2017.

Mike Newchurch, left, professor of atmospheric chemistry at the University of Alabama in Huntsville, and graduate student Paula Tucker prepare a weather balloon before releasing it to perform research during the solar eclipse, Aug. 21, 2017, on the Orchar

The Isle of Palms beach turns dark during the solar eclipse Monday, Aug. 21, 2017, on the beach at Isle of Palms, South Carolina.

This composite image of nine pictures shows the progression of a partial solar eclipse near Banner, Wyoming, Aug. 21, 2017.

Portland Taiko drummer Karen Tingey performs in front of a live video shot of the sun to introduce the solar eclipse from Salem, Oregon, Aug. 21, 2017.

People watch as the solar eclipse approaches totality from Clingmans Dome, which at 6,643 feet (2,025m) is the highest point in the Great Smoky Mountains National Park, Tennessee, Aug. 21, 2017.