In Pics: When US Witnesses First Total Solar Eclipse In 99 Years

The moon passes in front of the sun for a total solar eclipse visible from Farmington, Mo., Monday, Aug. 21, 2017 in Farmington, Mo. (Anthony Souffle/Star Tribune via AP)

Kolkata: Stargazers in the US were able to observe the first total solar eclipse in 99 years during Monday's 'Great American Solar Eclipse'. A team of physicists led by IISER-Kolkata said insights into the sun's coronal structure and diagnostics of the coronal magnetic field were important for space weather predictions linked to satellite operations and GPS navigation. The eclipse swept across the continental United States. The sun was surrounded by a jacket of gases called an atmosphere. (All images: AP)

The beginning of the solar eclipse is framed in the Netherlands Carillon in Arlington, Va., Monday, Aug. 21, 2017. The carillon is a gift from the government of the Netherlands and sits across the Potomac River from Downtown Washington. (AP Photo/J. David Ake)

Clouds roll passed the sun at 2:42 p.m., two minutes past the peak of the solar eclipse in Graham, N.C., on Monday, Aug. 21, 2017. (Steven Mantilla/The Times-News via AP)

Clouds break to show the partial solar eclipse behind the cross of St Mary's Catholic Church in Janesville, Wis., Monday, Aug. 21, 2017. (Anthony Wahl/The Janesville Gazette via AP)

A solar eclipse shows through a layer of clouds over the Ravenel Bridge in Charleston, S.C. on Monday, Aug. 21, 2017. (Wade Spees/The Post And Courier via AP)

A partial solar eclipse appears over the Statue of Liberty on Liberty Island in New York, Monday, Aug. 21, 2017. (AP Photo/Seth Wenig)

Campers from Steamboat Springs, Colo. observe the solar eclipse Tuesday, Aug. 21, 2017, at Shadow Mountain just east of Grand Teton National Park. (Erika Dahlby/Jackson Hole News&Guide via AP)

Clouds move in front of a solar eclipse in Mexico City, Monday, Aug. 21, 2017. (AP Photo/Marco Ugarte)

The moon begins to block the sun as a solar eclipse is seen through the clouds over the Gateway Arch, 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 photo shows solar flares as the sun emerges from a total eclipse by the moon, Monday, Aug. 21, 2017, in Dayton, Tenn. (Joe Songer /AL.com via AP)

Rain clouds obscure the solar eclipse tracking over Spaceship Earth at Epcot at Walt Disney World in Lake Buena Vista, Fla., Monday, Aug. 21, 2017. The eclipse was partially blocked as it approached totality because of the weather in the area. (Joe Burbank/Orlando Sentinel via AP)